WRAPUP 2-Four arrested as Bangladesh building toll rises to 340
* Owner of collapsed building on run, border authorities alerted
* Angry workers protest in Dhaka, burning and smashing cars
* Twenty pulled from rubble alive, 72 hours after disaster
* Rescuers work frantically to save 15 trapped workers
By Serajul Quadir and Ruma Paul
DHAKA, April 27 (Reuters) - Two factory bosses and two engineers were arrested in Bangladesh on Saturday, 72 hours after the collapse of a building where low-cost garments were made for Western brands, as the death toll rose to 340 but many were still being found alive.
The owner of the eight-storey building that fell like a pack of cards around more than 3,000 workers was still on the run. As many as 900 people could still be missing, police said.
Police said two of his relatives had been detained to compel him to hand himself in, and an alert had gone out to airport and border authorities to prevent him from fleeing the country. Continued...