<p>Air raid sirens warning of rocket attacks from the Palestinian Gaza strip sounded in Israel's commercial hub Tel Aviv on Saturday, a Reuters witness said, as cross-border fighting spilled into a second day.</p>.<p>There were no immediate reports of casualties and at least three explosions, possibly caused by interceptions, were heard in the city. </p>
<p>Air raid sirens warning of rocket attacks from the Palestinian Gaza strip sounded in Israel's commercial hub Tel Aviv on Saturday, a Reuters witness said, as cross-border fighting spilled into a second day.</p>.<p>There were no immediate reports of casualties and at least three explosions, possibly caused by interceptions, were heard in the city. </p>