Seattle police are investigating the possibility that a man found dead after being hit by a bus on Capitol Hill early Monday may have been down in the street before the bus got there.

Police spokeswoman Renee Witt said that’s one of the possibilities being examined by detectives investigating the death of a man believed to be in his 20s or 30s in the 1100 block of East Pine Street.

The bus driver, a man who has driven for Metro since October 2010, “is very shaken up by this collision,” said Metro spokesman Jeff Switzer. “Anytime there is a collision where someone is hurt or killed, it deeply affects everyone throughout the whole organization.”

Shortly after 6 a.m., someone ran into the Police Department’s East Precinct station on 12th Avenue, saying there had been a serious accident involving a bus, police Lt. Randy Yamanaka said.

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He said officers who responded found a man dead in the street, behind the bus, which was facing westbound at midblock.

Yamanaka said there were three passenger on the bus. None was injured.

Detectives interviewed the driver and passengers. A drug-recognition expert was called in, which Yamanaka said is routine in such cases.

Switzer said in addition to police, Metro’s safety officers are investigating.

“Metro is safety- and customer-driven, and our bus drivers work every day to avoid collisions,” Switzer said. “We’re working with Seattle police to understand the circumstances of this horrible incident.”

Jack Broom: jbroom@seattletimes.com or 206-464-2222