Western oil workers in Yemen are avoiding dangerous tribal areas after the kidnap of British oil worker John Brooke, 47, who was freed unharmed on Wednesday.
Extra security precautions and a lower profile are being adopted, oil companies in the area have reported.
Brooke works as a downhole well servicing engineer for US oilfield services firm Halliburton Energy Services. He is a supervisor at the Marib camp for workers supplying services to oilfields in Yemen.
Brooke, who is from Norwich, has been in Yemen for 12 years and has worked for Halliburton for 19 years.
The British Government told the Yemenis not to try a rescue after the bungled attempt to release hostages over two weeks ago, when three Britons and an Australian were killed.