MANILA (Reuters) - Philippine President Rodrigo Duterte said on Wednesday he wouldn’t rule out placing the entire country under martial law if the threat of Islamic State spreads.

Duterte cut short a visit to Russia and placed the southern island of Mindanao under military rule on Tuesday, and said he would keep it that way for a year if necessary.

Duterte assured the public he will not allow abuses under martial rule, even as he repeatedly said he will deal with terrorism harshly.