No one was injured in the explosions, Sky News reported Sunday.

Officials said a homemade bomb in a gasoline container went off near a bank in Getxo, cracking windows and causing damage to an automated teller machine.

An anonymous caller phoned authorities five hours later, saying members of the separatist group, Euskadi Ta Askatasuna, set up three bombs on shores in Laredo, Ris and Noja. The caller said a fourth bomb was planted at a golf course near Noja.

Police said they blocked off entrances to the locations and a bomb went off close to Laredo's beach.

Additional blasts took place in Laredo and near Noja, Sky News said.