Police also said they received reports that five people threw petrol bombs at a Japanese restaurant on the street level of a shopping mall in Cheung Sha Wan
Police said they believed the college was not the target for the bomb maker and that the devices were likely being hidden there for later use
Police also arrested 12 people on Monday suspected of preparing gasoline bombs
Companies have got caught in the middle of the protests. Chinese retailers and branches of lenders like Bank of China Ltd have been ransacked by vandals
Many of those attending voiced anger that chief executive Carrie Lam and Beijing have ruled out any further concessions despite the landslide election defeat
Financial secretary Paul Chan told lawmakers that the economy was set to contract 1.3 per cent in 2019 hitting the city's usually bulging coffers
The major headache for China is Hong Kong, where pro-democracy protesters hit the streets early, with a series of rallies against what they see as the erosion of their special freedoms
China's foreign ministry reiterated a threat of retaliation without offering any details
China's Foreign Ministry said on Thursday that legislation signed by Trump on Wednesday backing protesters in Hong Kong was a serious interference in Chinese affairs
Financial Secretary Paul Chan made the announcement to lawmakers Monday, explaining that the ongoing turmoil has hurt economic growth by some 2 percentage points this year
Asian businesses now have access to large, new capital
Another banner read "President Trump, please liberate Hong Kong."
It is only because the government of China decided to deepen its control on the erstwhile city-state that all hell broke loose
Hong Kong's Beijing-backed chief Carrie Lam has offered no additional concessions in the wake of the elections, and protesters said they felt compelled to return to the streets
Renewed calls to hit the streets came after Beijing and city leader Carrie Lam refused further political concessions despite a landslide victory for pro-democracy parties in local elections last week
The legislation was approved unanimously by the US Senate and by all but one lawmaker in the House of Representatives last week
While Hong Kong isn't new to sudden stock slumps, the fresh wave of declines is putting the spotlight on corporate governance
The likelihood of Beijing offering any new concessions in the short term remains slim, observers say, given the tough line taken so far.
The vote unfolded peacefully despite concerns it could be delayed or disrupted by violence following unrest in the leadup
Amid concerns that violence could cause authorities to delay the polls, first-time voters have been advised online to avoid spoiling their ballots