When did the latest bomb explosion take place?

A bomb ripped through a commuter train in central Pakistan, killing at least eight people, and injuring dozens more. So far there have been no claims of responsibility.(21)Police say the bomb exploded on Tuesday as the train was entering a station in Lahore, the capital of Punjab Province.(22)The attack occurred just one day after two other bombings in Pakistan which killed at least six people and injured 48 others.