MOGADISHU/ISLAMABAD, June 17 -- Pakistani crew members held hostage aboard a hijacked cargo vessel have issued an urgent appeal for help, as their captivity off the Somali coast enters its 57th day amid worsening living conditions and stalled negotiations.

The vessel, MT Honour 25, was seized on April 21 near Somalia's semi-autonomous Puntland region by armed pirates, along with its crew of 17 sailors, including 10 Pakistani nationals.

In a newly released video, second officer Syed Kashif Umar said the hostages are facing severe hardships, including food shortages and illness among crew members. He urged Pakistani authorities to intervene and pressure the ship's owners into entering meaningful negotiations with the captors.

The Indones...