Syria’s government sent a high-level delegation on Thursday to Oman, the Persian Gulf state that historically has helped broker negotiations in regional conflicts.

The delegation was led by Syria’s foreign minister, Walid al-Moallem, in his first visit to Oman since the Syrian war began more than four years ago.

Arranged at the invitation of the Omanis, the visit raised new speculation that diplomatic energy is intensifying to seek a way to end the war.

The official news agencies of Syria and Oman prominently reported the visit, in which Mr. Moallem conferred with his Omani counterpart, Yusuf bin Alawi. Specific details were not disclosed, but Sana, the Syrian agency, said both agreed that the “time has come for unifying constructive efforts to put an end to the crisis in Syria.”