Anti-government protesters holed up in a Hong Kong university were frantically searching for escape routes on Tuesday after more than two days of clashes with police, dramatic breakouts by rope and motorcycle and more than 1,000 arrests in 24 hours. About 100 protesters were trapped in the Polytechnic University a day after students, some tired and fearful of police storming the campus, tried again and again to flee, only to be beaten back by police firing rubber bullets, water cannon and tear gas.