A mob in Pakistan has beaten to death a Christian couple and burned their bodies in a brick kiln where they worked for allegedly desecrating the Koran.

The killing took place in the town of Kot Radha Kishan in eastern Punjab province, police said.

A spokesman said officers were trying arrest those involved.

The attack is the latest to target minorities in Pakistan for alleged blasphemy.

Shahbaz Sharif, the top elected official in the province, has ordered a probe into the incident.

Under Pakistan's blasphemy laws, anyone accused of insulting Islam or the Prophet Mohammed can be sentenced to death. However, the laws are often used to settle personal scores and target minorities.