Heavy combat between Thailand and Cambodia has entered a second week, with Cambodia claiming Thai bombing is hitting deeper into its territory.

The move came as China’s government urged both nations to exercise “utmost restraint” and de-escalate tensions.

Thailand said it’s taking steps to restrict exports of fuel and arms through a checkpoint with Laos on fears the goods are being diverted to Cambodia as the border clash between the two countries intensifies.

The U.S. Embassy & Consulate in Thailand published a security alert last week following a "significant escalation" across the border region along with reports of artillery and small arms fire exchanges.

Thailand will hold a general election on Feb. 8, with pre-poll surveys signaling a fractured mandate as outgoing Prime Minister Anutin Charnvirakul bets that the intensifying armed conflict with Cambodia will bolster support for his conservative party.

Explosions near Cambodia’s most sacred landmark have triggered alarm across Southeast Asia. Phnom Penh now accuses Thailand of carrying out air strikes deep inside its territory, dangerously close to Angkor Wat,

The tills at Siem Reap's Old Market, which is popular with tourists, are usually busy ringing in December, the high tourism season in Cambodia.