Israeli aircraft have launched a bombing raid on a tunnel in the Gaza Strip, the country's military has said.
An army spokesman said the tunnel, on the border with Israel near the Karni crossing, was being used to carry out an attack. No casualties were reported.
Secondary explosions seen after the air strike indicated explosives were hidden in the tunnel, the army spokesman said.
The move comes the day after a Palestinian suicide bomber killed three Israelis in the resort of Eilat.
That attack has endangered a truce that has been kept with the Palestinians since 26 November.
Three Palestinian militant groups - Islamic Jihad, al-Aqsa Martyrs Brigades and a previously unknown group called the Islamic Brigade - said they were behind it, saying the bomber was from Gaza but had entered the area via neighbouring Jordan.
It is the first suicide bombing in Israel since April 2006.