**At least seven people have been killed by a bomb left on a bicycle near a bus station in the southern Afghan city of Lashkar Gah, officials say.**A spokesman for the provincial governor of Helmand told the BBC seven people, all civilians, were killed and 14 hurt.
The explosion occurred at 1030 local time (0600GMT).
The blast comes as some 15,000 Nato and Afghan troops are involved in a 10-day old offensive around the city of Marjah - a Taliban stronghold in Helmand.
Reports said Tuesday’s blast happened near the traffic department in Lashkar Gah, the capital of Helmand province.
“The blast was caused by explosives attached to a bicycle and was controlled remotely,” Dawud Ahmadi, spokesman for Helmand’s provincial government, was quoted by Reuters as saying.
So far no group has claimed responsibility for the blast.