Iraqi security forces arrested more than a dozen activists here over the past week in a sweep that rights groups called a pre-emptive strike to prevent a flickering reform movement from springing back to life.
Ali Abdul Khaliq al-Jaf is one of four students still in jail in Baghdad. Their parents have been unable to get information.
Elsewhere in Iraq, in Ramadi, the capital of Anbar Province west of Baghdad, a series of explosions on Thursday aimed at security forces killed 15 people and wounded 20, local officials said.
The detentions in Baghdad came just days before the government faces a self-imposed deadline to demonstrate improvements in services and government reforms. Some analysts have said that if this date passes without significant reforms, there could be new rounds of reinvigorated demonstrations.