A militia commander who had been leading the fight against the Taliban has been detained by the militants after they seized the city of Herat, local officials say.

Mohammad Ismail Khan, nicknamed the Lion of Herat, is one of Afghanistan's most famous warlords. Videos posted on social media show him being held by the Taliban. The group have released an interview with him, although it is not clear if it was conducted under duress.

If confirmed, this would be a huge blow to the Afghan government in its fight against the militants.