Spanish police have arrested three more suspects in connection with the Madrid attacks two weeks ago, authorities say.
Spanish media reported that the three were of North African origin and were seized in the Madrid region, but did not say when they were detained.
The arrests bring the number of people currently in Spanish custody in relation to the bombings to 16.
At least 190 people are known to have died and more than 1,800 people were hurt in the train blasts on 11 March.