RABAT, April 13 (Xinhua) -- The Moroccan police said on Wednesday that three Iranians and four Bulgarians were arrested in Morocco for alleged links to an international human-trafficking ring, official news agency MAP reported.

       The three Iranians were arrested on Tuesday at Casablanca Mohammed V Airport when attempting to board a plane to Spain using false travel documents, the police said in a statement.

       The arrest of the four Bulgarians was made later for their alleged involvement in planning and facilitating the illegal immigration attempt, it added.

       Several forged travel documents, boarding passes and cell phones with international SIM cards were seized by police officers, according to the statement.

       The suspects, aged between 28 and 68, were taken into custody for questioning by the Moroccan authorities responsible for fighting illegal immigration, the statement noted.