Two bombs targeting a train in the restive western Pakistani province of Baluchistan killed at least six people on Friday and wounded 19, officials said.

The bombs hit the Jaffer Express which runs between the provincial capital, Quetta, and Rawalpindi, next to the capital, Islamabad, said Kashif Akhtar, a senior railways official in Quetta.

"The train was stopped, and then as people were leaving the train, there was another explosion under a different (carriage)," he told Reuters.