The International Red Cross says there is now a "non-international armed conflict" - or civil war - across more parts of Syria, widening its earlier designation.
The group had previously said such conflict existed between government forces and opposition groups in the flashpoint areas of Homs, Hama and Idlib. But ICRC spokesman Hicham Hassan said Sunday that hostilities have spread to other parts of Syria.
Hassan told VOA last month that such a designation is based on the intensity of the conflict and the organization of the armed groups and that it aims to give potential victims "the best protection possible."
He said Sunday that international humanitarian law applies to any area where there is fighting between government forces and the opposition.
That law spells out protections for civilians, saying they "shall not be the object of attack." Violations could lead to war crimes prosecutions.
Syrian President Bashar al-Assad said last month his country is in a "state of war."
The fighting in Syria continues, including what activists and residents described Sunday as the heaviest fighting to hit the capital, Damascus, since the 16-month uprising against Mr. Assad's rule began.
Meanwhile, the United Nations humanitarian affairs office is appealing for donors to help its mission to provide food for 850,000 people in Syria.