Four male teenagers surrendered to police late Friday night after a banker they allegedly attacked in Tokyo's Setagaya Ward on April 28 succumbed to his injuries earlier Friday and died in a Tokyo hospital, police said.

The teens, all aged 18, admitted to beating Akira Maki, 43, who worked at Chase Manhattan Bank's Tokyo Branch, around midnight April 28 on a platform at Sangenjaya Station on Tokyu Corp.'s Denentoshi Line.

Maki fell into a coma and died of a subarachnoid hemorrhage in a Tokyo hospital Friday.

Of the four, a self-employed teenager accompanied by his parents turned himself in at a police station in Sagamihara, Kanagawa Prefecture, at around 9:30 p.m. Friday, police said.

A second teenager, a painter, followed suit about 90 minutes later, giving himself up at the same police station.

The two others, a part-time worker and a vocational college student, turned themselves in to a police station in Machida in the western suburbs of Tokyo, police said.

Two of the suspects told police they beat Maki after he accused them of stepping on his foot in a train. They said they had been standing in front of Maki, who was seated at the time.

Police plan a postmortem examination in an attempt to shed light on the events leading up to Maki's death, as the teenagers' confessions partly contradict eyewitness accounts.

The four said they turned themselves in after hearing of Maki's death on TV, according to police.