WRAPUP 4-Many trapped in Bangladesh building rubble as toll tops 220
* 228 dead, 1,000 injured, toll could go much higher
* Cracks found in building day before collapse - police, industry official
* Canada's Loblaw, UK's Primark say their garment suppliers at site
By Serajul Quadir and Ruma Paul
SAVAR, Bangladesh, April 25 (Reuters) - Survivors from a garment factory that collapsed in Bangladesh killing at least 228 people described on Thursday a deafening bang and tremors before the eight-floor building crashed down under them.
Many more of the mostly female workers were still feared trapped in the rubble more than 24 hours after the disaster, which has brought renewed attention to Western firms who use Bangladesh as a source of low cost goods.
In the evening, local residents were still pulling survivors and bodies from the wreckage of the Rana Plaza building in the commercial suburb of Savar, 30 km (20 miles) outside the capital Dhaka, using crowbars and their bare hands in sweltering heat. More than 1,000 people were injured.
"I thought there was an earthquake," said Shirin Akhter, 22, who was starting her day at the New Wave Style workshop six floors up when the complex crumbled. Akhter was trapped for hours before breaking through a wall. She says her monthly wage was $38.
Relatives identified their dead among rows of corpses wrapped in white cloth in a nearby school field. Continued...