Quest for peace a never-ending duty: Pope

Vatican City: The whole of humanity has an permanent responsibility to seek peace, Pope Francis tweeted on Monday, calling the search "an open-ended task".

"The search for peace is an open-ended task, a responsibility that never ends and that demands the commitment of everyone," said his tweet.

His nine-language @pontifex account on Twitter has some 34 million followers, according to Twitter-tracking group Twiplomacy.