US politician killer had lost job

Bill Gwatney was taken to hospital but died of his injuries

A gunman who burst into the offices of the Arkansas Democratic Party chairman and killed him had lost his supermarket job earlier the same day.

Bill Gwatney, 49, was shot several times by 50-year-old Tim Johnson at the party headquarters in Little Rock.

It is not clear if the gunman, later shot dead after a police car chase into a neighbouring county, knew his victim.

Police said Johnson had lost his job at a Target store on Wednesday morning, after he wrote graffiti on a wall.

Mr Gwatney - a top ally of former President Bill Clinton and his New York senator wife Hillary - died later of his injuries in hospital.

Police said they did not believe Mr Johnson, from Searcy, a town about 50 miles (80km) north-east of Little Rock, had any criminal record.

A volunteer at the party headquarters building said Johnson had barged past staff to get into Mr Gwatney's office.

"He said he was interested in volunteering but that was obviously a lie," Sam Higginbotham, 17, told AP news agency.

Johnson then sped away in a truck and stopped at a nearby Baptist church, where he pointed his gun and told a church group manager he had lost his job.

Police said he was pursued to Sheridan, 30 miles (50km) south of Little Rock, before emerging from his truck to shoot at officers, who returned fire. Johnson later died at a hospital.

The Clintons said in a joint statement that they had lost "a cherished friend and confidante".

"We are deeply saddened by the news that Bill Gwatney has passed away," they said.

The couple lived for years in the Arkansas capital of Little Rock while Mr Clinton was governor of the state.

Barack Obama, who competed with Mrs Clinton for the Democratic nomination to run for US president in November, also said he was "shocked and saddened" by the news.

Mr Gwatney was a former state senator who had been due to attend the Democratic Party's national convention in Denver later this month as a super delegate.

He had supported Mrs Clinton during the contest for the party's presidential nomination.

Last December, a man who claimed to have a bomb strapped to his chest walked into Mrs Clinton's campaign office in New Hampshire, prompting a hostage drama lasting several hours.