New Delhi, June 23 -- Amid fears of Iranian retaliation following US strikes on its nuclear sites, both the United States and the United Kingdom on Monday (June 23) advised their citizens in Qatar to 'shelter in place'.

"Out of an abundance of caution we recommend American citizens shelter in place until further notice," the US Embassy in Doha said in a statement.

Soon after, the UK Embassy followed with similar advice: "Following a US security alert for US nationals in Qatar, out of an abundance of caution, we recommend that British nationals in Qatar shelter in place until further notice."

While neither embassy cited a specific threat, the coordinated messages have heightened public concern in a region already on edge due to the esca...