UNITED NATIONS - As the fighting in Syria gets worse, forces loyal to Syrian President Bashar Assad and rebels determined to oust him are committing an increasing number of violations of international humanitarian law, the EU humanitarian chief said on Tuesday.

"This is an asymmetrical war, and there is a degree of expansion of violation of international humanitarian law on both sides that seems to be escalating," Kristalina Georgieva, the European Union's commissioner for international cooperation, humanitarian aid and crisis response, told reporters.

"This is why it's so important to say in the simplest possible way: 'No, you cannot do that, or if you do it, there will be consequences,'" she said after meeting with Anthony Lake, head of the UN children's fund UNICEF.

The Syrian government and allied militia have been accused by the United Nations and Western governments of numerous large-scale massacres, though the rebels are also facing allegations of mass killings.

Please LIKE our Facebook page - it makes us stronger