Twelve armed men ambushed a bus carrying Sri Lanka's cricket team in the Pakistan city of Lahore yesterday.
Duguid said Sri Lanka and Pakistan were trying to have "positive relations", and said the US "utterly condemned" the attack.
The team arrived in Sri Lanka early Wednesday and star batsman Thilan Samaraweera was rushed to a city private hospital for further treatment.
Sri Lanka replaced India who refused to tour the country in the wake of attacks in Mumbai in November amid heightened security fears.