ATHENS, July 10 (Reuters) - Ryanair (RYA.I), said one of its planes was forced into an emergency ​landing at Thessaloniki airport in ‌Greece shortly after take-off on Friday after its window was "dislodged", with two industry sources saying ​a passenger was partially sucked ​out of a window. The airline said one ⁠person received medical assistance, but did ​not elaborate on the cause. The plane ​was flying from Thessaloniki to Memmingen airport in Germany. "The aircraft landed normally and passengers returned to ​the terminal," Ryanair said in a ​statement. Local media in Greece reported that a piece ‌of ⁠engine broke off and smashed a window, causing the cabin to decompress and sucking one passenger partially out of ​the window. ​Two sources ⁠with knowledge of the incident relayed the same details to ​Reuters. Unverified videos posted on social ​media ⁠from the inside of the plane showed a broken window and oxygen masks ⁠dangling ​from the ceiling.