U.S. defense contractor Lockheed Martin said on Wednesday it was continuing to work with the government on capability and performance upgrades for its F-35 jets.

Lockheed, which expects the jet to remain in service until 2070, said it would upgrade the engine to help deliver more power and greater cooling capability.

"We stand ready to support and continue to work with the U.S. government on the capability and performance upgrades that best support their requirements for the F-35," the company said in a statement.

(Reporting by Nathan Gomes in Bengaluru; Editing by Devika Syamnath)