The Foreign Office has reportedly asked staff working in Israel to take extra precautions following the terror attack in Delhi last week.
According to the Times of Israel website, diplomatic staff were warned not to travel in cars with Israelis and to avoid meeting Israelis in public areas.
In the incident in Delhi a device was attached to a diplomat's car. When it exploded, it left an Israeli woman with severe injuries.
A spokesman for the Foreign Office said he was unable to confirm or deny the warnings.