Three died on Thursday and another lost his life in a second blast on Friday.
NATO`s US-led International Security Assistance Force did not release the nationalities of the soldiers, in keeping with policy.
Details would be released by the soldiers` home countries, a spokesman said.
More than 560 foreign troops were killed last year in Afghanistan, where some 130,000 US-led troops are fighting an insurgency by hardline Taliban Islamists against the government of President Hamid Karzai.
(U.H-AK)
Editor: Priyambodo RH
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