YANGON, March 3 (CNA) - Protests against a military coup in Myanmar showed no sign of abating with more planned across the country on Wednesday (Mar 3), while Myanmar's ousted President Win Myint is said to be facing two new charges.

Security forces fired warning shots into the air as protesters gathered at one site in the commercial capital Yangon early on Wednesday, according to a journalist at the scene.

At least 21 people have been killed since the Feb 1 coup and police opened fire to break up crowds again on Tuesday.

An activist in Chin State said strikes were taking place in nearly all of its townships on Wednesday.

A group tracking arrests said dozens more people may have been detained on Tuesday, including a protest organiser who it said was taken away at gunpoint by security personnel in unmarked cars.

Win Myint's lawyer Khin Maung Zaw on Wednesday said he is facing two new charges, including over a breach of the constitution that is punishable by up to three years in prison.

Win Myint was arrested on Feb 1 along with Myanmar's leader Aung San Suu Kyi just hours before the military seized power in a coup. Win Myint is also facing charges over violating protocols to stop the spread of the coronavirus.

Lawyer Khin Maung Zaw said Win Myint's trial date is not known.

The military government has also charged Aung San Suu Kyi with several offences that critics say are trumped up merely to keep her jailed and potentially prevent her from participating in the election promised in a year’s time by the military.