Three foreign nationals have been kidnapped and murdered in the Afghan capital Kabul, officials say.

The three were from India, Malaysia and Macedonia, according to police, who are treating it as a terrorist incident.

Investigators told the BBC the trio were taken from their car on their way to the airport.

Their bodies were found later in the Mussahi district of Kabul province. No group has so far claimed to be behind the killings.

The three are believed to have worked as cooks for Sodexo, a French food services company.

Identity cards were also found and have been cross-checked with the firm, security officials told Reuters news agency.

The Malaysian national is said to be 64, the Indian 39, and the Macedonian 37.

Kidnapping by militants or criminals gangs seeking a ransom has been rife in Afghanistan in recent years. Locals are most often the targets, but foreigners have also been seized.

Two professors, an Australian and an American, were abducted in August 2016 while working for the American University of Afghanistan in Kabul.

In January 2017 they appeared in a Taliban hostage video, appealing to then president-elect Donald Trump to offer a prisoner swap for their release.

The Taliban is Afghanistan's biggest Islamist militant group. However, the jihadists of Islamic State have also launched bloody attacks in urban centres.