A rocket fired from Lebanon struck northern Israel on Tuesday, causing no damage or injury, and Israel responded with artillery fire at Lebanon, the Israeli military and a Lebanese security official said. An Israeli military spokeswoman said Israel was treating the shooting “very seriously” and that it held the Lebanese government responsible. The rocket slammed into an open area near Qiryat Shmona, security officials said. There were no reports of casualties from the rocket or the artillery fire.

A version of this article appeared in print on October 28, 2009, on page A13 of the New York edition.