Residents on the island of Lesvos prevented the NGO ship 'Mare Liberum' to tie at the port of Mytilini for resupply on Thursday.
The move was part of the continuing protests on the island due to the migrant crisis, that has seen locals clash with police in recent weeks over a proposal for more migrant camps on the island.
The 'Mare Liberum' belongs to the NGO Sea Watch, which conducts search and rescue missions at sea.
Sea Watch departed for an unknown destination, after being informed by port authorities that it cannot sail east and north of the island due to military exercises involving shell firing.
Before heading to Mytilini port, the ship was tied at Skala Loutron (south of Mytilini), which it left after its crew was attacked by unknown people on Sunday night.