An explosion in the northern Gaza Strip killed a Palestinian militant and critically wounded another, medical workers said on Saturday.
Medical workers had earlier said two militants had been killed in the blast, reported Reuters.
The Popular Resistance Committees militant group said an Israeli air strike targeted a group of its gunmen as they approached the Israel-Gaza border near the town of Beit Hanoun.
An Israeli army spokesman denied that the army had carried out an air strike.
Skirmishes between Israel and Palestinian militants in the Hamas-controlled territory have threatened a five-month ceasefire along the Israel-Gaza frontier.