Cuban officials on Monday lowered flags before dawn to mourn 32 security officers they say were killed in the U.S. weekend strike in Venezuela, Cuba's closest ally, as residents of the island nation wonder what the capture of Venezuelan President Nicolás Maduro means for their future.

Cuban authorities lowered flags before dawn on Monday to mourn 32 security officers they say were killed in a US weekend strike in Venezuela, as anxiety deepened across the island over what the capture o f President Nicolás Maduro could mean for Cuba’s fragile future.

Venezuela is Cuba’s biggest oil supplier, but no shipments have departed Venezuelan ports since Maduro’s abduction.