Philippine authorities are temporarily blocking an online gaming app after a school shooting
The charges come as the firm is involved in a defamation suit against Fox News.
The powerful quake was recorded at 9:59 p.m. local time on Tuesday.
Duterte was detained as he returned to Manila on Tuesday, officials said.
One U.S. military service member and three defense contractors were killed.
The voting machine company executives allegedly paid $1 million in bribes.