Speaking in a question-and-answer session with Republican Senator John McCain in Manhattan on Tuesday, the former Democratic president took a swipe at the Obama administration’s policy on Syria, saying Washington’s failure to intervene in the conflict there is “a bad mistake”, Politico reported on Thursday.

“Some people say, ‘Okay, see what a big mess it is? Stay out!’ I think that’s a big mistake. I agree with you about this,” Clinton told McCain.

McCain, who recently took a trip to Syria through Turkey and met some militant commanders there, has been a vocal critic of Obama’s cautious policy on Syria. He has asked the White House to arm the militants with missiles.

"We could use our stand-off weapons, such as cruise missiles, to target Assad's aircraft and ballistic missile launchers on the ground," McCain said last week.

Now that the Syrian forces have seized the strategic town of Qusayr and launched a massive operation to regain the full control of the northern city of Aleppo, internal pressure is mounting on Obama to directly get involved in the conflict by sending weapons to the militants.

In a move which is highly expected to dim hopes for a ceasefire in the war-torn country, the White House announced on Friday that US is to going to send direct military aid to the militants in Syria.

The sad scene of daily killing is going on in Syria with the country’s army trying hard to save the country from foreign-backed terrorists and the government announcing readiness for engaging in international talks, with no pre-conditions to end the crisis.

Fallowing US’s controversial decision a spokesperson for UN Secretary General Ban Ki-moon said he remained against "any further militarization" of the conflict in Syria, saying the people there need peace not more weapons.