ADANA, Turkey

Turkish police arrested three suspects on Tuesday for allegedly sending a shipment of four unmanned aerial vehicles (UAVs) to terrorist groups in Syria, security sources said. 

The suspects were arrested in Istanbul and the southern Adana province, while another of Syrian nationality was held in the southern Hatay province, said the sources who asked not to be named, due to restrictions on speaking to the media.

Acting on a tip-off received earlier this month, Adana police detained another suspect in a cargo office, while allegedly trying to send drones to people with links to terrorist groups in Syria.

Read more: Turkey: 3 arrested for alleged drone shipment to Syria