Myanmar's civilian President Htin Kyaw, a close ally of government leader Aung San Suu Kyi, has authorized the police to proceed with a case against two detained Reuters reporters accused of violating the country's colonial-era Official Secrets Act, a senior government spokesman said.

Journalists Wa Lone, 31, and Kyaw Soe Oo, 27, were arrested last Tuesday evening after they were invited to dine with police officers on the outskirts of Myanmar's largest city, Yangon.

"The Ministry of Home Affairs has already submitted the case to the Office of the President," Zaw Htay, spokesman for Aung San Suu Kyi, said by phone late Sunday. He added that the president's office had given approval for the case to go ahead.