Green Day will headline a United Nations Human Rights-backed global climate concert on Tuesday at the famed Fillmore in San Francisco.

Representatives of several human rights organizations have held a press conference demanding the immediate release of a prominent attorney and activist detained last week.

Laura Guerrero’s 26-year-old son Nicolas Guerrero died during protests against Colombian President Iván Duque’s tax reform proposal.

In a pre-recorded message from Cuba, José Daniel Ferrer said he and others started a hunger strike on March 20. The prominent opposition leader said about 30 people are involved in the protest. That was down from 47 on Thursday.