At least 59 people have been killed after gunmen stormed a police training centre in Pakistan taking hostages.

Officials said at least another 100 were wounded after up to six militants attacked the centre in the Baluchistan province opening fire and detonating explosive vests.

Major General Sher Afgan, chief of the paramilitary Frontier Corps, said the attackers belonged to the banned Lashker-e-Jhangvi group - an Islamic militant group affiliated with al-Qaida.

At the time of the attack on Monday about 700 trainees were at the base.

Most of those being treated at city hospitals had gunshot wounds, although some sustained injuries jumping off the roof of the hostel and climbing a wall to escape.

Nearly all of the wounded were police and two were paramilitary troops, officials said.

The attack came hours after gunmen shot and killed two customs officers and wounded a third near the town of Surab, about 90 miles (145 kilometers) south of Quetta.

Earlier on the same day two gunmen on a motorcycle killed a police intelligence officer in the country's northwestern Khyber Pakhtunkhwa province.