Washington and allies exploring options to bring Assad back to the table, Kerry says on fourth anniversary of conflict.
An operation commander says Iraqi air force strikes have been limited and not accurate enough to support ground forces.
Spokesman claims city seized by ISIL will fall within days, but local command centre says troops need reinforcements.
Group of mostly children and women were trying to cross into Syria, Turkish foreign minister says.
Kurdish officials say remnants of a suicide blast on highway between Mosul and Syria showed presence of chlorine.
Spokesperson says Tehran has pledged to expand Yemen's ports, help build power plants and provide Yemen with oil.
US Secretary of State says though progress has been made, he could not vouch a deal will be reached by the end of March.
Secretary-General Ban Ki-moon says world "divided and incapable of taking collective action" to resolve crisis.
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|William T. Hathaway|