Kuwait’s interior ministry said on Tuesday it had arrested four people affiliated ​with Iran’s Revolutionary Guards who attempted ​to infiltrate the Gulf state by ⁠sea, the state news agency ​KUNA reported.

The ministry added that one ​member of Kuwait’s armed forces was injured in clashes with the infiltrators.

Kuwait later ​summoned Iran’s ambassador and handed ​him a protest note over what it described ‌as ⁠the infiltration of Bubiyan Island by the Revolutionary Guards, the foreign ministry said.

Bubiyan Island is the ​largest of ​Kuwait’s ⁠coastal island chain, located in the northwest of the ​Gulf.

Kuwait condemned the incident as ​a ⁠hostile act and said it reserved the right to defend its ⁠sovereignty ​under Article 51 ​of the UN Charter.