A suicide bomber on a motorbike set off his explosives in a crowded area in southern Afghanistan on Monday, and preliminary reports said up to 28 people were killed and about 60 wounded, officials said. The explosion went off in the town of Gereshk in Helmand province. Gereshk district chief Abdul Manaf Khan said about 28 people were killed, including 13 police and 15 civilians. Dr Tahir Khan said 23 people were killed and 59 wounded. The blast came at around 6:30pm in GereshkÂ’s crowded main square, just before evening prayers. Khan said the explosion went off near a taxi stand.