The opening of the Israeli embassy in Bahrain comes as the US is pressing its traditional ally Riyadh to sign a similar deal for Saudi Arabia, a Muslim powerhouse and home to Islam's holiest shrines.

A source familiar with the matter says no embassy staff have been harmed and declined to elaborate further.

A ceremony was held inside the embassy's compound with dozens of diplomats and officials attending the reopening of the diplomatic mission for the first time in seven years.

The embassy says there have been many 'vicious' security incidents against workers of foreign mining enterprises in the area, and Chinese citizens still outside Bangui were requested to evacuate immediately.

David Ballantyne Smith who was employed as a security guard at the embassy was extradited to Britain from Germany following his arrest by German police in August 2021.

US officials warned the risk of a Russian invasion remained high and that Russia may attempt to fabricate a pretext for a conflict, despite Moscow saying it was moving some of its troops away from the border.

The normalisation of relations has been deplored by the Palestinians, who want their demands for statehood free of Israeli occupation addressed first.

Some other countries have started vaccinating their citizens or donating jabs earmarked for them.

The foreign ministry in its admonition says that issues such as sexual orientation 'are choices for only Singaporeans to debate and decide'.

Before departing, the North's most senior diplomat in Malaysia accused Malaysia of siding with Washington in a 'conspiracy' against Pyongyang, and committing a 'large hostile act'.

The foreign ministry says Mun Chol Myong's extradition was only carried out after the due legal process had been exhausted, and in accordance with the principles of justice and rule of law.

It is understood that at least three former ministers have been silently campaigning for diplomatic jobs.