Israeli Officer Arrested in Connection With Killing of 2 Palestinian Teenagers JERUSALEM - An Israeli border police officer has been arrested on suspicion of involvement in the fatal shooting of two Palestinian teenagers in the West Bank during a protest in May, officials said on Wednesday. Further charging the atmosphere at a time of heightened Israeli-Palestinian tensions and religious friction, a mosque in a village in the West Bank was damaged overnight in what was said to be an arson attack, and a firebomb was thrown at an old synagogue in an Arab town in northern Israel, the police said. There were no reports of injuries in either attack. In the May shooting case, video taken from a security camera at a business in Beitunia, a town outside Ramallah, showed that the two youths were knocked down, apparently by gunfire, about an hour apart. The teenagers were at the site of intermittent clashes between security forces and Palestinians on Nakba Day, when Palestinians mark Israel's creation and mourn the expulsion and flight of hundreds of thousands in 1948. The teenagers did not appear to be engaged in violent or provocative behavior at the time they were shot, and the episode prompted international condemnation. Mosque Is Damaged in West Bank Fire Residents and officials surveyed the damage to a mosque in a Palestinian village in the West Bank after what was said to be an arson attack. Publish Date November 12, 2014. Photo by Atef Safadi/European Pressphoto Agency. Palestinian health officials determined that the teenagers, Nadeem Siam Nawara, 17, and Mohammad Mahmoud Odeh Salameh, 16, were killed by live ammunition. Human rights groups have said an autopsy conducted on Mr. Nawara confirmed that he was killed by a live bullet. At the time, an Israeli military spokesman said a preliminary inquiry did not indicate the use of live fire but added that investigations by the military and the police were continuing. Shay Hakim, a spokesman for the border police, said on Wednesday that a police officer had been arrested on Tuesday as part of the investigation. He and other Israeli officials did not identify the officer or provide other details, but since only one autopsy was conducted, the case appeared to hinge on the death of Mr. Nawara. Siam Nawara, the father of Nadeem, recently agreed to let the Palestinian authorities hand over a bullet he had found lodged in his son's backpack to the Israelis for forensic testing, which appears to have led to a turn in the case. Mr. Nawara, 42, a resident of Ramallah, said he had initially refused to allow the Palestinian Authority's chief prosecutor to transfer the bullet to Israel because he lacked faith in the Israeli authorities. He changed his mind, he said in a telephone interview, after he came to believe that there was more evidence to support a case against the Israeli forces. Mr. Nawara, who runs a hair salon, said he pored over video footage and news photographs from the protest for months, then made files on half a dozen border police officers and submitted them to the Israeli police. He said he also expected the autopsy report to be officially completed later this month. "I have not asked for financial compensation, but I want justice from the court," Mr. Nawara said. I believe that Israel is a country governed by the sovereignty of law for Israelis. Will it be also for Palestinians? Benny Katz, a lawyer defending the border police officer, told reporters outside a Jerusalem courthouse where the officer appeared on Wednesday that his client denied that he had used live fire, despite repeated attempts by investigators to get him to confess to doing so. In the Palestinian village of Mughayer, near Ramallah, the Israeli police investigated reports of a fire at a mosque, and a police spokesman, Micky Rosenfeld, said a search for suspects was underway. Another mosque in the village was set on fire and damaged in 2011. Faraj al-Naasan, the mayor of Mughayer, said by telephone that the fire was discovered around 3:45 a.m. and described it as "a criminal act." "There is no doubt that it is the doing of settlers," he said. Mr. Naasan said the fire had damaged walls and a library. Hebrew graffiti has appeared at previous mosque arson sites, but it was not present at the Mughayer site, he said. The timing of the fire, after a series of deadly vehicular assaults and stabbing attacks by Palestinians against Israelis in recent days, added to suspicions that it was a revenge attack. Jewish extremists have long engaged in what are known as "price tag" operations, so named to exact a price for violence by Palestinians or Israeli actions against the unauthorized building of Jewish settlements in the West Bank. The police are also investigating the firebombing of a synagogue in Shefaram, an Arab town in northern Israel. The attacks on the mosque and the synagogue come at a time of simmering tensions fueled in large part by a dispute over a holy site in Jerusalem's Old City. Tensions have also risen in Arab towns in northern Israel after a police officer fatally shot an Arab Israeli man in Kafr Kanna in Galilee over the weekend. The Israeli authorities said the man attacked a police vehicle while wielding a knife, but video from the scene appeared to show him retreating when he was shot.