Three men were kidnapped on Monday in southern Nigeria while working on a production for South African satcaster SuperSport.

Nigerian journalist Bowie Attamah and cameraman Alexander Effong, plus South African journo Nick Greyling, were in a bus bound for the airport after covering a local soccer match when they were attacked by gunmen.

“The attackers ordered out more than 20 people inside the bus and took away the three and the bus,” said Felix Awogu, SuperSport’s general manager in Nigeria, in an interview with the AFP.

Kidnappings in Nigeria have escalated in recent years, with hostages frequently held and released unharmed after ransom demands are met. The oil-rich Niger Delta region, not far from where the journalists were abducted, is particularly volatile, with kidnappings of foreign oil workers commonly used to extort money from oil companies.

Attacks on journalists are not uncommon but are usually politically motivated. According to SuperSport execs, the net had not received ransom demands from the kidnappers.