Thai police have summoned key figures of the country’s “yellow shirt” movement for questioning over a blockade of two major airports last year which stranded hundreds of thousands of passengers, a government spokesman said on Sunday.

Core members of the royalist “yellow shirts” – also known as the People’s Alliance for Democracy (PAD) – were called in for questioning over closures of both Suvarnabhumi and Don Muang airports, including media mogul Sondhi Limthongkul, one of the group’s leaders, and Kasit Piromya, the foreign minister.