Police and security officials fired bullets and tear gas at protesters in Bangladesh on Friday, as internet and mobile services were cut off after days of deadly clashes over the allocation of government jobs. The protests, which began weeks ago but escalated sharply on Monday, represent the biggest challenge to Prime Minister Sheikh Hasina since she won a fourth consecutive term in a January election that was boycotted by the main opposition parties. Advertisement The fresh clashes follow the bloodiest day of the protests to date, with local media reporting 22 people killed as protesting students attempted to impose a…