GUJRAT Gunmen killed five persons, three of them Britons of Pakistani origin, in a shootout here at a graveyard on Friday. The tragic incident took place in village Marrarian Sharif, Gujrat, where Muhammad Yousuf, his wife Perveen Akhtar and daughter Tania came from Britain to meet a relative. The family was scheduled to leave for UK on Saturday (today). A relative told this scribe that one sister of the attackers was married to Mohammad Yousuf's son but the marriage broke down which created rivalry between the families. Another relative said that Yousuf who came here to meet his uncle Basharat visited a grave of his kin along with his wife and daughter when the attackers ambushed them and opened indiscriminate fire. According to police inspector Sarwar Gondal, Yousuf's son Qamar had left his wife Nabeela and the dissolution of the marriage was the reason behind the killing. He said Khursheed Arif, Nabeela's brother, along with others gunned down Yousuf and four other people in the graveyard. The police officer said one of the attackers Qamber, s/o Nazir Ahmed, had been arrested while two other nominated accused: Naveed Arif and Sheraz would be arrested soon. The indiscriminate firing by the attackers also resulted in the killing of one of their accomplices. Agencies add: A friend of the family in Britain also said they were killed in a family dispute while paying their respects at a cemetery. Mohammed Iqbal told Sky News TV: They were leaving the graveyard of someone that had passed away. It was a family dispute that obviously went horribly wrong. He said two of Yousafs sons had returned to Lancashire from Pakistan early but had now flown back to the country after being told of the deaths. He said: They went for a wedding and a holiday and they are now having to bury members of their family. The British High Commission in Islamabad confirmed that three British citizens were killed on Thursday, saying it was offering consular assistance to the family and was in touch with Pakistani authorities. Lancashire Police said officers were providing support to family members in Britain and were working with authorities in Pakistan. A spokesman said: Three members of a family from Nelson who were visiting the country for a wedding were killed in a shooting incident. The circumstances surrounding the deaths are unclear at this time but police in Lancashire are liaising with the authorities in Pakistan to ascertain exactly what has happened. The Foreign Office said it was investigating reports of the shooting.