* Cargo ship, 10 crew released; $5.7 million ransom claimed
* Expert says payment made in Kenya, ship heads to Djibouti
By Abdiqani Hassan
BOSASSO, Somalia, June 17 (Reuters) - 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.
