Israeli officials confirmed another bomb had been found in the car belonging to one of its diplomats based in Tblisi, Georgia. The device was safely defused.
Israeli Prime Minister Benjamin Netanyahu immediately blamed Iran for the attacks.
“Iran is behind these attacks. It is the biggest exporter of terror in the world,” Mr Netanyahu told members of his rightwing Likud party.
In the New Delhi attack, the wife of an Israeli diplomat was believed to have suffered minor injuries in an explosion in the rear of her car. She was helped from the scene of the attack to the Israeli embassy and later taken to hospital but her injuries appear to be minor.
An eyewitness told a local television channel he had seen the car being followed by a young man on motorbike, who leaned out and threw or attached “a device” to it shortly before the explosion.