Biman Bangladesh Airlines has suspended all flights to Riyadh until October 17 due to the closure of operations at King Khalid International Airport (RUH) in Riyadh, Saudi Arabia.

In a press release issued on Monday, Biman said it would provide updated information in due course regarding further decisions on the flights and the flight schedule.

“Biman Bangladesh Airlines sincerely regrets the temporary inconvenience caused to its valued passengers due to the suspension of flights. In this situation, the airline seeks the patience and cooperation of its valued passengers,” the statement said.

Operations at Riyadh's King Khalid International Airport were suspended after a Houthi attack on October 10, which left 13, including two Bangladeshis, dead and over 300 injured.

The airport was again attacked on Sunday, leaving one dead and a dozen hurt.

Bangladesh, among other countries, strongly condemned the attack.

Embassies of different countries warned their citizens about using airports in the Gulf nation.

The US embassy in Saudi Arabia warned government employees that they needed special authorisation to use King Khalid International Airport in Riyadh, as well as the airports in Jeddah and Dammam.

The Australian embassy in Saudi Arabia advised members of its community to "shelter in place until further notice".

The UK Foreign Office advised against all travel to parts of Saudi Arabia.

Yemen's Houthis issued a new warning to all airline companies not to use Saudi airports, the BBC reported on Sunday.

In a statement, the group "reiterate[d] their warning... against using Saudi airports and airspace".

This is because "they are potential targets and sites for operations by our forces".

Houthi military spokesman Yahya Saree said Mecca and Medina were exempted from this warning.

Not since the al-Qaeda insurgency of the mid-2000s has the kingdom faced such a serious threat.