The UN said on Monday it would issue invitations for marathon Syrian peace talks to begin this week, but opposition groups signalled they would stay away unless the government and its Russian allies halt air strikes and lift sieges on towns.

As the clock ticks towards Syrian peace talks, question of who will attend still unclear

The UN said on Monday it would issue invitations for marathon Syrian peace talks to begin this week, but opposition groups signalled they would stay away unless the government and its Russian allies halt air strikes and lift sieges on towns.