A U.S. soldier and a marine were killed in two attacks in Baghdad and Anbar province on Tuesday, bringing the number of U.S. troops killed in Iraq on Tuesday to six, the U.S. military said on Wednesday.

A U.S. soldier was killed at around 9:30 a.m. (0630 GMT) Tuesday when "terrorists" attacked his patrol with small arms fire in northern Baghdad, the U.S. military said in a statement.

A marine assigned to Regimental Combat Team 7 died of wounds sustained in clashes in the volatile Anbar province in western Iraq, the statement added.

Earlier, the U.S. military said four American soldiers were killed on Tuesday when a roadside bomb struck their vehicle in west of the capital.

"The soldiers assigned to Multi-National Division-Baghdad were killed at about 6:50 a.m. (0350 GMT) on Oct. 17 in west of Baghdad, " the military said in a statement.

The latest deaths brought the U.S. military death toll in October to 63, which makes it one of the deadliest month for U.S. troops in Iraq.

The names of the victims are being withheld pending notification of next of kin, said the U.S. military.

Over 2,770 U.S. soldiers have been killed in Iraq since the U.S. -led invasion in March 2003, according to media tally.

Source: Xinhua