By Panarat Thepgumpanat and Orathai Sriring BANGKOK/PHNOM PENH, Dec 9 (Reuters) - A fierce border battle between Thailand and Cambodia raged for a second day and spread to new fronts on Tuesday, as both countries accused each other of shelling civilian areas and Bangkok vowed to push on with its planned military operations.

BANGKOK, Dec 9 (Reuters) - Cambodia is open to ‌immediate ​bilateral talks with Thailand to ‌bring a halt to a raging border conflict, a ​top adviser to its prime minister said on Tuesday, after the neighbours accused each ‍other of violating a truce ​brokered by U.S. President Donald Trump.

LONDON -- At least seven civilians have been killed and approximately 20 others have been injured in Cambodia amid renewed border clashes with neighboring Thailand, according to the Cambodian Ministry of National Defense.

Thousands of people on the Thailand-Cambodia border have been displaced by fresh fighting that underscored deep divisions between the South East Asian neighbours. The fighting left a Thai soldier and four Cambodian civilians killed in the most serious escalation since July, when five days of clashes killed dozens of people.

Fighting between Cambodia and Thailand escalated along their contested border, as the Southeast Asian neighbours both said they would not back down in defending their sovereignty.

Meanwhile, Thailand has 493 military aircraft compared with Cambodia’s 25, with Bangkok operating modern fighter jets like the Saab Gripen and F-16s, plus transport aircraft and helicopters. Where Phnom Penh does have more numbers are rocket projectors, with 463 to 26, suggesting its priority is artillery and ground-based firepower.

Cambodian officials have issued a chilling warning to their Thai counterparts after accusing the country of a 'reprehensible act' amid the latest round of border hostilities

Cambodia is open to immediate bilateral talks with Thailand to halt their border conflict, a top adviser to its prime minister said on Tuesday, after the neighbours accused each other of violating a truce brokered by U.