The International Security Assistance Force (ISAF) says that four American soldiers have been killed in the past 24 hours in Afghanistan.
The military said on Monday that the soldiers were killed in separate attacks in the war-ravaged country.
Two US soldiers were killed in a homemade bomb blast in the south, where another soldier was killed in a militant attack on Sunday, ISAF said in a statement.
The fourth soldier died in another roadside bomb blast in the country’s eastern region on Monday, the statement added.
Meanwhile, the Afghan Defense Ministry said in a statement that three Afghan soldiers were killed in a series of roadside bomb attacks in the southern Helmand province.
Two other Afghan soldiers were injured in a roadside bomb blast in Musa Qala district of Helmand.
Despite the presence of 100,000 international troops in Afghanistan, there has been no sign of stability in the war-torn country.
Thousands of civilians and Afghan security forces have lost their lives in Afghanistan since the US-led invasion of the country in 2001.