Myanmar ? Five helicopters working for the U.N. landed Saturday in Myanmar to help with cyclone relief efforts, as problems continued to dog efforts to help victims of the May 2-3 storm.

The five chartered helicopters – two from South Africa, and three from Uganda – were transported to Bangkok, Thailand, more than a week ago and flew into Myanmar’s biggest city, Yangon, said U.N. World Food Program spokesman Paul Risley. They join one that began ferrying supplies on WFP’s behalf to the hard hit Irrawaddy delta on Monday.

“This is a big boost in the U.N. cyclone response capacity,” Risley said. “The helicopters will multiply the work of the first helicopter, which has been shuttling food and humanitarian assistance.”