Indonesian police officers carry the body of an illegal migrant from Myanmar upon arrival at a hospital in Medan, North Sumatra, Indonesia Friday, April 5, 2013. Police said a violent brawl between Buddhist and Muslim asylum seekers from Mynamar in an immigration detention center in Belawan of North Sumatra early Friday leaving eight dead and 15 injured. AP Photo/Binsar Bakkara BELAWAN, Indonesia (AP) - In a testament to just how deep tensions are running, Buddhist fishermen and Muslim asylum seekers who fled Myanmar hoping for a better life brawled with rocks and knives Friday at an immigration detention center in Indonesia, leaving eight dead and another 15 injured, police said. The deadly melee broke out in North Sumatra province, where more than 100 Rohingya migrants - most intercepted off Indonesia's coast in rickety boats - and 11 illegal fishermen from Myanmar were being held together, said local police chief Endro Kiswanto. He said witnesses told police the clash started after a Muslim Rohingya cleric and a Buddhist fisherman got into a heated debate about sectarian violence that erupted in their homeland last month, when mobs of armed Buddhists torched Muslim-owned homes and shops in central Myanmar, killing dozens and forcing thousands to flee. Insults were quickly traded, and the cleric was allegedly stabbed by a fisherman, said Yusuf Umardani, detention center chief. When the cleric screamed, his friends jumped in to help. From there, a burst of fighting broke out so quickly, security guards were too late to stop it. "The violence took place so fast, and it was completely unexpected because they had been living peacefully here so far," Umardani said. Most of the dead victims suffered severe head injuries. Apparently, they fought using anything that they could get - rocks, wood, chairs and knives. "I was out with two of my friends, and when we came back ... we saw them," Win Thike Oo, one of the fishermen who survived, told an Associated Press photographer at the scene. Our friends were covered in blood. If we were there at the time, we would also be dead. The three surviving fishermen have been moved to a separate building and hundreds of police have been deployed to secure the center. A forensics team was working to collect evidence, and determine how the migrants obtained knives. Kiswanto said 25 Rohingya asylum seekers were being questioned by police and would be prosecuted under Indonesia law if suspected of being involved in the killings. Police are also reviewing surveillance recordings of the incident. Last year, hundreds of people were killed and more than 100,000 left homeless in violence in western Myanmar between ethnic Rakhine Buddhists and Rohingya Muslims. "We actually don't understand about what is happening in my country," said survivor Oo, who has been detained for nine months at the center. We are only fishermen. We don't care about politics or conflict. Associated Press writer Niniek Karmini contributed to this report from Jakarta, Indonesia.