Human Rights Watch discovered several weapons-storage sites in Libya where surface-to-air missiles are missing, raising concerns that the weapons could arm an Iraq-style insurgency.
Libya rebels are amassing to the east and west of Sirte, and have given Qaddafi forces in the strategic city until Saturday to surrender.
The International Criminal Court is considering a new arrest warrant for Muammar Qaddafi's son Khamis after a massacre was discovered next to his brigade's barracks.
In Tripoli, human rights workers and locals are uncovering evidence of mass killings by Muammar Qaddafi's retreating army. Meanwhile, water distribution and other basic services are in disarray.
After taking the oil towns of Brega and Ras Lanuf, Libyan rebels are trying to persuade Sirte residents to lay down their arms. The city, Qaddafi's hometown, is one of the regime's last holdouts.
An attack by Muammar Qaddafi's forces on Zawiyah, Libya, was turned back by opposition forces Monday. Neither side seems able to gain the upper hand.