Somali pirates have freed a German-owned cargo ship, seized in April, after they received a ransom, a pirate and maritime source said on Friday. The Antigua and Barbuda-flagged Susan K, and with its crew of 10 Ukrainians and Filipinos, was released on Thursday. "The German cargo ship has now sailed away. We have taken $5.7 million in ransom," pirate Ibrahim told Reuters by phone from coastal Ras Guna, in semi-autonomous state of Puntland. Andrew Mwangura, maritime editor of The Somalia Report, confirmed the release. He said the ransom had been paid in the Kenyan port city of Mombasa but could not confirm the sum. "Next port of call Djibouti. It is not yet known if she has started moving out to safe waters," Mwangura told Reuters.