It did not say where the rocket fell or report any casualties. There was also no word on injuries on the Gaza side of the border.
It was the first rocket fire since Friday evening, which triggered repeated Israeli strikes throughout that night and into Saturday in which two members of Hamas s military wing were killed.
The Israeli army says it holds Hamas responsible for all attacks originating from the territory under its control.
The latest wave of rocket fire followed US President Donald Trump s statement on Wednesday recognising Jerusalem as the capital of Israel .
Palestinian security officials in the enclave said the sites hit were two Hamas posts.
The Israeli military said the targets were "two terror posts", without identifying them.