A rocket fired from Egypt's Sinai desert struck the southern Israeli resort of Eilat on Thursday, police said, fuelling Israeli worries over militant activity in the border area.
No casualties or damage were reported.
An Egyptian security source told Reuters in Cairo that Egyptian forces were searching the area along the border but had not found any evidence indicating any rockets had been fired from the Sinai.
The head of Eilat police, Ron Gertner, told Israeli Army Radio that explosions were heard in Eilat soon after midnight. Police found the remains of one rocket in a construction site, about 400 meters (yards) from a residential area.
Asked if the rocket was fired from Sinai, Gertner said: "Based on our working assumptions and the range, yes."