Chongqing police yesterday doubled their reward to 600,000 yuan (HK$680,000) in efforts to find an unidentified attacker who shot dead a PLA sentry and stole his sub-machine gun last month.
About 10,000 policemen working on the case for two weeks have failed to make progress.
The latest bounty offer came together with the release of four blurry pictures of the attacker that were captured by closed-circuit television at the scene and limited information about the attacker, China News Service reported.
Police said the attacker might have a criminal record, or have served in the armed forces or at least received some military training.
'[We] initially found that the attacker is a 1.7-metre-tall man aged between 18 and 45, medium build, wore a light-coloured shirt, dark trousers, and a silk hat. He hid the stolen sub-machine gun in a white crocheted bag,' the Gaoxin district police bureau said on a wanted announcement posted all over the municipality's streets yesterday.
Chongqing authorities said any tip-off enabling the police to solve the case would be entitled to a 300,000 yuan reward from the Chongqing Public Security Bureau and another 300,000 yuan from the bureau in Gaoxin district, where the rare assault happened.
It said witnesses who could give the suspect's address or related information would also be rewarded. The announcement gave four contact numbers and an e-mail address for the special investigation team.