A Pemex employee wears a black ribbon during a mass in honour of the Pemex employees, who died in an explosion at the company's headquarters, in Mexico City

 
A Pemex employee wears a black ribbon during a mass in honour of the Pemex employees, who died in an explosion at the company
A Pemex employee wears a black ribbon during a mass in honour of the Pemex employees, who died in an explosion at the company's headquarters, in Mexico City February 4, 2013. Mexican rescue workers found three more bodies over the weekend amid the rubble of the deadly blast that tore through state oil firm Pemex's main office complex, the government said, as search efforts appeared to near a close.The death toll from Thursday's explosion stands at 36, Pemex said via Twitter. One person was reported still missing. REUTERS/Edgard Garrido