Yesterday, news broke that four New York Times journalists in Libya were released six days after they were captured by pro-government forces while covering a rebel uprising in the country’s east.

However, The Committee to Protect Journalists remains concerned about 13 other journalists who are either missing or are reportedly in Libyan government custody, including editorial cartoonist Mohamed al-Amin and five other Libyan journalists.

According to CPJ, the other missing Libyan journalists are reporter Atef al-Atrash, blogger and critical political writer Mohamed al-Sahim, former editor-in-chief of culture magazine Arajin Idris al-Mismar, head of the Libyan Journalists Syndicate Salma al-Shaab and correspondent Suad al-Turabouls.

“We call on Libyan authorities to release those journalists in their custody and to assist in efforts to locate those who are missing,” CPJ executive director Joel Simon said.