MEXICO CITY (Reuters) - Rescuers swarmed over rubble with shovels and picks on Thursday in a torturous search for survivors two days after Mexico's deadliest earthquake in a generation, while politicians sought to outdo each other in donating party funds to help victims.

As the arduous search through mountains of debris continued, signs of exhaustion crept in following Tuesday's 7.1 magnitude quake that killed at least 282 people, with growing discontent and rumours swirling online.