Virtually on life-support, the mission of U.N. and Arab League envoy on Syria Lakhdar Brahimi has been energised by the Moscow-Washington accord, which has set in motion a flurry of diplomatic activity for finding a political solution to the Syrian crisis.

With Tuesday’s talks among Mr. Kerry, Russian President Vladimir Putin and Foreign Minister Sergei Lavrov offering a glimmer a hope, Mr. Brahimi, decided not to throw in the towel.

“The Secretary-General [Ban Ki-moon]…has asked the joint special representative [Mr. Brahimi] to stay on, and he has accepted to stay on,” said U.N. Deputy Secretary-General Jan Eliasson.