A still image taken from a video footage shows Russian opposition leader Alexei Navalny being detained by Interior Ministry members during a rally for a boycott of a March 18 presidential election in Moscow, Russia January 28, 2018. NAVALNY.COM/Handout/Reuters TV via REUTERS

MOSCOW (Reuters) - Russian opposition leader Alexei Navalny was released from police custody late on Sunday after a brief appearance at a rally in Moscow calling for the boycott of a March presidential election that he said would be a rigged.

Navalny’s lawyer, Olga Mikhailova, told Reuters that her client had been released without charge but would have to face court at a later date.

If charged with violating laws on holding demonstrations, Navalny could face up to 30 days in jail.