Two Kuwaitis who attacked US marines were not acting alone and one headed a group that was planning more assaults on Americans, an Kuwaiti Interior Ministry official said today.

A US marine who survived what Kuwait called a “terrorist act” was recovering today as investigators studied how two attackers infiltrated military exercises off the emirate’s coast.

Two Kuwaitis shot at US Marines during war games on an island off the Gulf state today, killing one and wounding another in what the Kuwaiti government called a terrorist act. Fellow Marines shot dead the assailants.