On Saturday, several users on social media who claimed to be the citizens of Myanmar posted shocking pictures and videos of military repression against the protestors at Yadanarpon Dock in Mandalay
State railway workers on Sunday had called a strike, joining a loosely organised Civil Disobedience Movement that was initiated by medical workers and is the backbone of the resistance.
The February 1 coup has brought an abrupt halt to Myanmar's fragile progress toward democracy, as Suu Kyi's party was about to begin a second five-year term.
Suu Kyi, who was ousted in a military coup on February 1, has already been charged with possessing walkie-talkies that were imported without being registered.
Biden demanded that military must relinquish the power it seized and demonstrate respect for the will of the people of Burma as expressed in their November 8th election.
The military says it acted because November's election, which Suu Kyi's National League for Democracy won in a landslide, were marred by irregularities.
The protesters are demanding that power be restored to the deposed civilian government and seek freedom for the nation's elected leader Aung San Suu Kyi.
Myanmar's military has announced it will hold a new election at the end of a one-year state of emergency it declared Monday when it seized control of the country.
The 75-year-old Suu Kyi is by far the country's most dominant politician, and became the country's leader after leading a decades-long nonviolent struggle against military rule.
Her National League for Democracy (NLD) had already declared a landslide victory based on its own tallies, prompting street celebrations by supporters.