New Delhi, Nov. 13 -- A Russian court Tuesday extended the jailing of an 18-year-old street singer on charges seen as punishment for performing anti-war songs, an action denounced by human rights activists as part of a rampant crackdown on free speech over the war in Ukraine.

Diana Loginova was ordered held for another 13 days by the court in St. Petersburg on charges of violating public order with her October performance. It was the third consecutive sentence for Loginova, who has remained in custody since her initial arrest on Oct. 15.

Loginova, a music student who goes by the stage name Naoko in the band Stoptime, also was ordered to pay fines for "discrediting the Russian armed forces."

Alexander Orlov, a fellow Stoptime member, ha...