Unidentified gunmen attacked Sunday cleaning company's headquarters in the city of El-Arish, North Sinai, and set it on fire, but without casualties among employees, Al-Masry Al-Youm News reported. The sources and eyewitnesses revealed in a statement to Al-Masry Al-Youm that a group of armed men attacked the company's headquarters in El-Zhoor neighborhood and set fire to the mechanical department, which spread to the vehicles in the company's parking lot. The fire led to a series of explosions and a cloud of smoke that covered the sky, according to eyewitnesses. One of the company's employees said that gunmen stormed into the workers' rooms and forced them outside, before setting fire to the whole place. Ambulances, civil protection units and security forces rushed to the place, in order to put out the fire.