Boston police: three more 'suspects' arrested over Marathon bombs There were also no plans yet for a press conference on the announcement, according to the statement. A police spokesman, Katherine Shea, told Reuters that she had no further details to provide. "It's happening right now," Shea said. The Boston Globe quoted a police source as saying that three college students had been arrested in connection with the bombings, and that the three were connected to Dzhokhar Tsarnaev, the younger of the two brothers believed responsible for the bombings, at the University of Massachusetts Dartmouth, where he was a student. A different source told the Globe that the three allegedly helped Tsarnaev, who is in custody in a prison medical centre, "after the fact." Other media reports suggested there had been no evidence the three had participated in planning the attack. CNN said the three were accused of "making false statements" and "conspiring to obstruct justice." Tsarnaev, a 19-year-old American citizen of Chechen ethnicity, has been charged with using a weapon of mass destruction in the bomb attacks, which killed three people and wounded more than 260 as spectators watched at the finish line of the race on April 15. His older brother Tamerlan, 26, was killed during a shoot-out with police days after the attacks, shortly before Dzhokhar's capture. The brothers are alleged to have detonated backpacks holding pressure cookers packed with explosives near the finish line. They are also accused of killing a police officer during their time on the run. But investigators have not suggested the pair were part of a larger group. This afternoon, the Associated Press reported that two Kazakh students who were friendly with the younger Tsarnaev had appeared via video for a visa violation hearing in immigration court in Boston today. Lawyers for Azamat Tazhayakov and Dias Kadyrbayev, both originally from Kazakhstan, said they had been interviewed extensively by federal investigators - but that authorities have not indicated that they had anything to do with the bombings. Federal authorities would not comment to the Associated Press. The pair have been held in a county jail for more than a week on allegations that they violated their student visas while attending the University of Massachusetts Dartmouth with Tsarnaev. Attorney Robert Stahl said Tazhayakov and Kadyrbayev were drawn to Tsarnaev because he also spoke Russian. The marathon attack was not mentioned in court and their cases were continued. Edited at telegraph.co.uk by Sarah Titterton