A Russian soldier was killed in an explosion targeting an armored vehicle in Syria’s Homs province, Russian state news agency TASS reported on Thursday.
The ministry of defense said the explosion happened during a reconnaissance by the Russian military of the route of the humanitarian convoy.
Russia has sent soldiers to Syria to flight alongside Syrian army troops loyal to President Bashas al-Assad.
The explosion comes after a Russian-brokered deal for cessation of fighting collapsed last week.
Russian generals brokered the deal late on Tuesday to avert bloody urban warfare after the heaviest bombardment by elite army units of the rebel core of the city of Deraa in a two-month siege that has forced many of the 50,000 inhabitants to flee.
The deal collapsed on Friday after disagreements over the extent of army control and disarming former rebels. The area is the birthplace of peaceful protests in 2011 against President Bashar al-Assad and his family that were met by force before spreading across the country and evolving into civil war.
Rebels and local elders refused new army demands on Friday for the army to spread checkpoints across residential neighborhoods of Deraa al Balaad and conduct house-to-house searches, saying the deal allowed for a less pervasive presence when it falls under complete state civilian administration.
They also said Russian military police should maintain patrols to bar militias who had encircled the enclave from entering.