At least one person was killed and two were wounded in an explosion in the Gaza Strip on Sunday and a Palestinian group accused Israel of trying to kill its fighters in a strike on their car, Reuters reported. The Israeli army denied involvement, but said it carried out an air strike on gunmen it believed were trying to penetrate the fence around the Gaza Strip and had hit one Palestinian. Palestinian witnesses said there was a small crater and what looked like pieces of a missile near the car. They said Israeli helicopters were hovering over the area -- near to where the army acknowledged opening fire.