At least 40 people have been hurt, some seriously, in a poison gas attack in the Bulgarian capital.

A bomb containing a toxic chloride gas was thrown into a visitors' area in a Sofia traffic police office, the Interior Ministry said.

At least one person was said to be in a life-threatening condition and four others were critically ill.

Police said a suspect was held two hours after the attack, but there was no word on possible motive.

The attack occurred at 1000 (0700GMT) when the office was crowded with people.

http://news.bbc.co.uk/1/hi/world/europe/3613979.stm