The US support for terrorists is the main obstacle for routing the Islamic State terrorist grouping (outlawed in Russia) in Syria, Russian Defense Ministry spokesman Major-General Igor Konashenkov said on Wednesday.

"US colleagues’ support for terrorists and pandering to them rather than terrorists’ combat efficiency is the main obstacle for completing the rout of the ISIL [the former name of the Islamic State]," the general said.

Russia’s Aerospace Force is ready to totally halt any actions of the Islamic State terrorist group in Syria passed off by the United States as ‘coincidences’, he went on. 

The general told reporters about several offensives against Syrian government troops launched from the 50-kilometer area around the locality of al-Tanf near the Jordanian border, where "a US military mission" is headquartered.

"If US officials view such actions as unforeseen ‘contingencies’, Russia’s Aerospace Force is ready to begin the complete elimination of such ‘coincidences’ in the area of their control," he said.

"In all appearances, success of the Syrian army with the support of the Russian Aerospace Forces, as well as a swift liberation of Euphrates River Valley from IS (Islamic State, outlawed in Russia) runs counter to plans of the US colleagues," said the major general.