Three Britons - all members of the same family - have been shot dead in eastern Pakistan, according to local police.

巴基斯坦当地警方证实，三位英国人——同一家庭的所有成员在东巴基斯坦地区被射杀。

The father, mother and 22-year-old daughter were killed at a cemetery¹（墓地，公墓） in a village near the city of Gujrat.

The three, of Nelson, Lancashire, were shot by four gunmen - understood to be related to them - after an argument broke out. Another woman was killed.

The Foreign Office says the British High Commission in Islamabad is investigating the reports.

BBC Islamabad correspondent（通讯员） Aleem Maqbool said two of the gunmen had been arrested, but the other two were still at large（未被捕的） .

Police have said two of the suspects are nephews of the murdered couple - who were in Pakistan to attend a wedding.

But, our correspondent added, officers had not given any indication of what the dispute was about.

The bodies of the murdered family are expected to be buried later on Friday.

Lancashire Police said they were offering help to their relatives in Nelson.

A spokesman said: "The circumstances surrounding the deaths are unclear at this time but police in Lancashire are liaising（保持联络） with the authorities in Pakistan to ascertain²（确定，查明） exactly what has happened.

"Officers are speaking with family members in Nelson and they are being offered support at this difficult time."