(Corrects July 1 item to make clear in fifth paragraph that Somalia is mainly Muslim not Christian)
MOGADISHU, July 1 (Reuters) - Al Shabaab militants shot dead three Somali soldiers in the capital Mogadishu on Tuesday, their fourth attack since the start of the Ramadan fasting month that the Islamists have threatened to target.
Sheikh Abdiasis abu Musab, al Shabaab's spokesman for military affairs, said they carried out the attack in the southern Mogadishu district of Afarta Jardiin.
"We have shot dead nine government soldiers in Mogadishu since Ramadan started. We shall continue and intensify the operation," abu Musab said.
The group had previously said its gunmen shot dead three people on Sunday and killed another three government employees on Monday in two separate bomb blasts.
The government and African Union peacekeepers have stepped up security to try to stop the Ramadan attacks by al Shabaab, which has waged a seven-year campaign to impose its strict interpretation of Islamic law in the mainly Muslim country.
The militants view people who work for the government, such as the security forces, as collaborators with non-Muslims due to the involvement in Somalia of African Union soldiers, the United Nations and Western powers trying to contain the group.
Police officer Nur Jamac said al Shabaab shot the three soldiers in the head on Tuesday as they talked in the street.
In the past year or so, al Shabaab has killed dozens of people in guerrilla-style assaults in Mogadishu, on U.N. offices, the presidential compound, parliament and the courts.
In a separate attack, police in Afgoye, a district 30 km southwest of Mogadishu, said two clan elders were assassinated by pistol-wielding assailants on Monday.
It was not immediately clear who was behind that attack, a senior police officer in Afgoye told Reuters. (Reporting by Abdi Sheikh and Feisal Omar; Writing by Duncan Miriri; Editing by Alison Williams)