British police told the Israeli Embassy in London minutes before Thursday's explosions that they had received warnings of possible terror attacks in the city, a senior Israeli official said.
The official spoke on condition of anonymity because of the nature of his position.
Israel was holding an economic conference near the scene of one of the explosions. Israeli Finance Minister Benjamin Netanyahu was supposed to attend, but the attacks occurred before he arrived.
Just before the blasts, Scotland Yard called the security officer at the Israeli Embassy and said warnings of possible attacks had been received, the official said. He did not say whether British police made any link to the economic conference.