The "TubaTV Park Bombing" incident have
a reason today

In the press conference, police reveal the reason:

A TubaTV staff ordered a takeout, but the food was so appalling, so that staff left a dislike to the restaurant in the takeout
software. This angered the restaurant owner, so the owner placed a timer bomb outside the park to retaliated him.

After time what heard police defuse the bomb, the staff dance on his house's roof.