The U.S. Navy’s top military officer told lawmakers Tuesday that Iran’s detention of 10 sailors in January went against international law.
“Those sailors by international law should not have been captured and detained,” said Adm. John Richardson, chief of naval operations, at a House budget hearing. 
“I think we’ve made that very clear that that behavior is not consistent with international law,” he said.
Richardson called the incident “another indication of the type of threat we’re dealing with here.”
On Jan. 12, Iran intercepted the sailors as they were transiting two small craft, known as riverine boats, from Kuwait to Bahrain. Defense officials have said a navigational error caused the boats to drift into Iranian waters.
The Iranian military boarded the boats and filmed crew members kneeling with their hands on their head, and in following days released video of the sailors being detained, including one wiping away tears.
They were detained for 16 hours before Secretary of State John Kerry secured their release. The incident infuriated members of Congress, particularly those staunchly opposed to the nuclear deal.
“We don’t want our sailors ever treated in that manner again, and there should be some repercussions,” Rep. Rodney Frelinghuysen (R-N.J.), chairman of the House Appropriations Defense Subcommittee said at the hearing.
“Absolutely,” agreed Rep. Steve Israel (D-N.Y.), who opposed the deal.
Richardson said a Navy investigation into the matter would be released in a month or two.

Source: The Hill, 2 March 2016