Four NATO soldiers were killed Sunday in two separate attacks in Afghanistan

Four NATO soldiers were killed Sunday in two separate attacks in Afghanistan, the force said, just over a day after 30 US occupation troops died in a helicopter crash.
  
Two were killed in a militant attack in southern Afghanistan and the other two in a similar attack in the east, NATO's International Security Assistance Force said in a statement.
  
ISAF did not provide details including the exact locations where the troops were killed, nor did it release their nationalities, following its policy of leaving the announcement to their respective nations.