Already under fire over the Mossad's alleged role in an extra-judicial killing, Israel's diplomats on Friday risked criticism on grounds of taste over a message posted by their U.K. embassy on Twitter.

According to a report in theU.K. newspaper The Guardian, a tweet issued by the embassy on Thursday read: "@israeluk You heard it here first: Israeli tennis player carries out hit on #Dubai target".

The message, which linked to a story on Israeli tennis player Shahar Peer's victory in the third round of a Dubai tournament, was an apparent double-reference to the assassination of Mahmoud al-Mabhouh in Dubai, widely believed to have been carried out by Israeli intelligence.

By Friday morning the 'tweet' had been removed from the site.

CCTV footage released by Dubai police shows the suspected assassins dressed as tennis players following Mabhouh into the hotel lift as a member of staff showed him to his room.

Mabhouh's death sparked a diplomatic row between Israel and the U.K. after it emerged that murder suspects forged the identities of British citizens living in Israel.

Israel has so far refused to comment on the killing. Summoned by the British Foreign Office to help 'clarify' the affair, Ambassador Ron Prosor said on Thursday he was 'unable to shed any further light on the events'.