Cambodia says it has granted Vietnam permission to use its airspace as part of the search for the Malaysian airlines flight that went missing Saturday.
Keo Sivorn, head of Cambodia's Civil Aviation Department, Thursday said Vietnamese aircraft have flown over Cambodian territory since Wednesday.
"Vietnam has the resources for search and rescue, and yesterday it requested cooperation from us to search for the missing plane in southern Vietnam and some parts of our flight zone."
Earlier this week, Cambodian officials said they would not be sending resources to join the search effort, which now involves more than 80 ships and aircraft from 12 countries.
Government spokesman Phay Siphan said Thursday that Phnom Penh is willing to help where possible.
(This report was produced in collaboration with the VOA Khmer service.)