Biman Bangladesh Airlines on Saturday extended the suspension of all its flights from Dhaka to Riyadh indefinitely, citing security concerns as attacks continue to target Saudi Arabia.

The state-owned carrier also extended the suspension of its Dhaka-Dammam flights until 20 October and said it plans to resume that service on 21 October, subject to clearance from Dammam airport authorities. It said decisions on the Riyadh route would depend on further instructions from Riyadh airport authorities.

Biman's flights to Jeddah and Madinah are operating as usual. The airline said it was using higher-capacity aircraft on the Madinah route until 18 October and would return to Boeing 787 aircraft from 19 October, and that it was arranging additional Jeddah flights based on passenger demand.

The suspensions follow the 10 October missile attack on Riyadh airport. The Civil Aviation Authority of Bangladesh said that, of at least 114 direct and transit flights cancelled between Bangladesh and Saudi Arabia over the eight days to Saturday afternoon, 50 were direct services and 64 were transit flights, affecting 17,701 passengers.

Biman cancelled 18 direct flights and US-Bangla Airlines 10, while the Saudi carriers Saudia and Riyadh Air cancelled 12 and 10 direct flights respectively. Among transit operators, IndiGo suspended 22 flights, Emirates 14, Qatar Airways nine, SalamAir seven, flydubai six, Air India five and EgyptAir one. US-Bangla has suspended its Riyadh flights until 21 October.

The 10 October attack on Riyadh airport killed two Bangladeshis. The expatriates' welfare and overseas employment ministry published a list of injured Bangladeshis, including 11 migrant workers and 13 umrah visa holders.

Saudi Arabia is Bangladesh's largest destination for overseas employment. From 1 January to 29 September this year, 307,887 of the 563,693 Bangladeshis who went abroad for work travelled to Saudi Arabia, or 54.6 per cent of the total, according to the Bureau of Manpower, Employment and Training.