At least seven people have been killed and several wounded in two suicide attacks in southwestern Pakistan, officials said.

As people converged on the scene of the first bombing near the city of Quetta, a second suicide bomber blew himself up, according to Saud Gohar, a provincial police chief.

Thursday's attacks come amid heightened tension in the province of Baluchistan since the death of a leading ethnic Baluch fighter last month.

Waheed Arshad, a military spokesman, said the seven people confirmed dead were three soldiers and four civilians.

Residents in Quetta, a city close to the Afghan border, have seen regular bombings and shootings.