So-called killer robots could pose major legal questions if military forces develop them to be completely autonomous, Human Rights Watch said from London.
Syrian forces are using cluster munitions against civilian targets, with more than 100 sites hit in the last six months, Human Rights Watch said.
The Syrian government's "relentless" use of cluster bombs against rebels is contributing to rising civilian casualties, human rights advocates said.
A military official in Cairo questioned suggestions that cluster munitions uncovered in Syria were manufactured by an Egyptian company.
The use of autonomous drones that could fire weapons without human intervention or control must be prohibited by international treaty, a U.S. rights group says.
U.S.-made Stinger missiles have found their way into the hands of Syrian rebels but it's unclear how they were delivered, a Russian commander said.
Damascus denied using cluster bombs to combat rebel forces, as new videos showed cluster bomb canisters and widely ejected small "bomblets" in Syrian cities.
The Kremlin said Monday there was nothing to confirm reports from a rights group that it was behind cluster bombs deployed in Syria.
An Armenian aid plane heading for Syria was escorted by Turkish fighter jets and forced to land in east Turkey for a security inspection Monday, officials said.
The Joint Special Representative of the U.N.- Arab League Envoy on Syria met with the Turkish president to discuss continuing violence in Syria.