Biden to attend memorial for slain MIT police officer

US Vice President Joe Biden will travel to Massachusetts Wednesday for the memorial service for a police officer allegedly slain by a Boston bombing suspect, the White House said.

Massachusetts Institute of Technology (MIT) police officer Sean Collier was killed, apparently by one of the brothers accused of carrying out the April 15 attack, as they tried to evade a massive manhunt.

The elder brother Tamerlan, 26, was killed in the chaotic aftermath of a police shootout while his sibling Dzhokhar Tsarnaev, 19, was captured alive late on Friday night and will now stand trial over the bombings.

President Barack Obama traveled to Boston on Thursday, hours before Collier was shot, to lead memorial services for the three people killed during the double bombings a week ago.

Obama was also holding a private moment of silence in the White House on Monday afternoon, to mark the passage of a week since the attacks.