Firefighters work to extinguish fire at a parking lot where five oil trucks caught fire in Jalalabad, capital city of eastern Afghan province of Nangarhar on May 20, 2013. At least one person was killed in the fire on Monday afternoon. Police officials ruled out involvement of militants in the incident. (Xinhua/Tahir Safi)

Firefighters work to extinguish fire at a parking lot where five oil trucks caught fire in Jalalabad, capital city of eastern Afghan province of Nangarhar on May 20, 2013. At least one person was killed in the fire on Monday afternoon. Police officials ruled out involvement of militants in the incident. (Xinhua/Tahir Safi)

Firefighters work to extinguish fire at a parking lot where five oil trucks caught fire in Jalalabad, capital city of eastern Afghan province of Nangarhar on May 20, 2013. At least one person was killed in the fire on Monday afternoon. Police officials ruled out involvement of militants in the incident. (Xinhua/Tahir Safi)

Firefighters work to extinguish fire at a parking lot where five oil trucks caught fire in Jalalabad, capital city of eastern Afghan province of Nangarhar on May 20, 2013. At least one person was killed in the fire on Monday afternoon. Police officials ruled out involvement of militants in the incident. (Xinhua/Tahir Safi)