OTTAWA, May 25 (Reuters) - Canadian Prime Minister Mark Carney on Monday told Israeli President Isaac Herzog that the treatment of activists detained by Israel had been "appalling" and described the situation in Gaza as "catastrophic," Carney's office said in a statement."The Prime Minister reiterated that the appalling treatment of civilians, including Canadian citizens, aboard the Gaza-bound flotilla was unacceptable, and he called for an independent investigation," the statement said.

Twelve Canadians were among 420 people on boats intercepted by Israel as they attempted to bring a symbolic amount of aid to Gaza in the midst of Israeli restrictions.

Canadian Prime Minister Mark Carney on Monday denounced the "appalling treatment" of activists aboard the Gaza-bound aid flotilla as "unacceptable," in a call with Israeli…