Kabul - A soldier serving in the NATO-led International Security Assistance Force (ISAF) died of wounds sustained in an explosion in southern Afghanistan, the ISAF said Wednesday.

The blast occurred after an ISAF convoy came under militant attack Tuesday in the Nahri Sarraj district of Helmand province, it said in a statement.

The ISAF did not disclose the nationality of the soldier; however, mostly British soldiers are stationed in Helmand.

The death was the second of a NATO soldier in the province in the past three days. On Monday, a British soldier was killed during fighting with militants in the Nad Ali district.

More than 150 international soldiers have died in Afghanistan this year. (dpa)