BAQUBA (AFP) - An Iraqi Sunni tribal chief who led a US-financed militia battling Al-Qaeda militants was killed by a roadside bomb on Sunday along with his wife and their four children, police said. The blast that killed Sheikh Abbas al-Tami and his family near Buhriz, in the southern part of the city of Baquba, the capital of Diyala, was the latest in a series of deadly attacks across Iraq. Al-Tami was the head of the Majmaa tribe and led a Sahwa, or Awakening group, that is paid by American forces to battle Al-Qaeda. He was driving the family car when the attack took place, police said. Meanwhile, a minibus passenger was killed and four others were wounded in a separate bomb attack in the Buhriz area, an insurgent stronghold, police said. Earlier police in the troubled northern city of Kirkuk reported that two children were killed and two others were badly wounded when a bomb exploded as they played in an empty lot. In a separate incident just north of the Iraqi capital in Mansuriyah, gunmen broke into the home of a woman, killing her and two of her daughters and wounding three other daughters, local security sources said. A local hospital confirmed the incident and police said they were unsure of the reason for the attack. Meanwhile, Damascus and Baghdad are discussing ways to ease the tension between the two neighbours in the wake of last week's raid inside Syria by Iraq-based US forces, the Foreign Ministry said on Sunday. The Ministry said in a statement that Syrian Foreign Minister Walid Muallem telephoned his Iraqi counterpart Hoshyar Zebari on Saturday in a bid to ease the tension. "They discussed relations between the two countries and ways to enhance them and how to overcome tensions in the aftermath of the raid," the statement said. American forces a week ago raided a Syrian border village in an operation a US official in Washington said targeted "militants" who smuggle arms and fighters into Iraq. Damascus said eight civilians were killed in the helicopter assault that occurred inside Syrian territory. The incursion triggered fresh tension between Damascus and Baghdad, and Syria reportedly reduced the presence of its forces in border areas. The US military has regularly accused Syria of turning a blind eye towards foreign insurgents entering Iraq to fight the US occupation. Iraq, meanwhile, has sent extra police to boost security along its border with Syria after Damascus reduced its troops, an interior ministry spokesman in Baghdad said on Sunday. The additional forces, from western Anbar province, were sent to secure areas where foreign fighters are known to infiltrate Iraq, Major General Abdel Karim Khalaf said. The policemen are expected to be deployed around Iraq's border town of Al-Qaim, a known transit point for foreign fighters entering the country from Syria. Al-Qaim is close to Al-Sukkiraya village in Syria where last Sunday's US attack took place.