One of Colombia’s most-grizzled and important rebel fighters is calling on President Barack Obama to do more to support peace and to free a guerrilla leader jailed for more than a decade in the United States.

Speaking amid the trees of his jungle hideout in southern Colombia, the guerrilla commander known by the alias Martin Corena said such a move would be the best way for the Obama administration to back with actions its public support for an approaching deal to end decades of bloody fighting.