An explosion occurred in Lahore after Pakistan downed an Indian drone. Tensions between India and Pakistan have escalated.

NEW DELHI/ISLAMABAD (Reuters) -A blast was heard in Pakistan's eastern city of Lahore on Thursday morning, according to broadcaster Geo TV and a Reuters witness, a day after Indian strikes at multiple locations in the country and fears of an escalation in conflict between the nuclear-armed neighbours.

The sudden announcement of a U.S.-brokered ceasefire followed four days of steady escalation between India and Pakistan and mixed signals from Washington.

India and Pakistan on Saturday agreed to a ceasefire following U.S.-led talks to end the most serious military confrontation between the nuclear-armed rivals in decades.

India and Pakistan have confirmed a ceasefire deal after U.S.-led talks to end a conflict between the nuclear-armed rivals.