A Taliban suicide bomber riding a bicycle detonated himself next to a police bus in Kabul on Sunday, killing a policeman and a civilian in the first major attack in the Afghan capital this year.

"We have two people killed -- a policeman and a civilian," Hashmat Stanikzai, Kabul city police spokesman, told AFP.

He said the suicide bomber riding a bicycle targeted the police bus and that 20 police and passers-by had also been wounded, some of them seriously.

In the last major blast in Kabul, a Taliban suicide attacker detonated an explosives-packed car next to a NATO military convoy on December 27, killing three NATO personnel and injuring six civilian passers-by.

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