(CNN) — Four Americans, including journalists, were arrested in Bahrain and are accused of entering the country under false pretenses and participating in “attacks on police,” according to a police statement released Monday.

The media members “had not registered with the concerned authority and were involved in illegal activities,” police said.

The police statement says all four Americans, including a woman, entered on February 11 and 12 on tourist visas and that the case has been referred to the public prosecutor.

The U.S. Embassy in Bahrain said it was aware of the situation but was unable to comment.

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