On Monday, Thailand started to control its land borders. They stopped tourists from going into Cambodia. This is because Thailand and Cambodia are having a disagreement about their border, and they are both doing things to respond to each other.

After a fight on May 28, the two countries' relationship got worse. One Cambodian soldier died in this fight, which happened in a small area that both countries want. The countries agreed to stop fighting, but they are still doing things that make the situation difficult.

On Monday, Thailand's Prime Minister Paetongtarn Shinawatra said that Thailand will check people more carefully at its borders. Tourists cannot leave. Only students, people who need to go to the doctor, and people who need to buy important things can enter or leave Thailand.

She said they wanted to stop people from going to casinos in Cambodia, but it looked like all visitors would be stopped.

The Thai army said on Monday that they have started new rules at all border crossings between Thailand and Cambodia in five areas. Only people who really need to cross the border can go through.

Cambodia stopped using some Thai internet services. They also stopped getting electricity and fuel from Thailand. This was because of a problem with their border. Before this, Cambodia got 30% of its fuel from Thailand.

Paetongtarn said on Monday that Thailand will think about stopping exports that help scam operations in Cambodia. They will also work with other countries and international groups to stop online crime in Southeast Asia.

Earlier this year, Thailand tried to stop online scams in Myanmar. They stopped electricity, internet, and gas in towns near the border where the scams were happening.

In April, the U.N. said that Cambodia is a center for online scams. People there trick others online with fake love stories, false investment ideas, and illegal gambling games.

Some people have criticized Paetongtarn because they think she is too soft on Cambodia. These people are often right-wing groups who have always been against her father, former Prime Minister Thaksin Shinawatra.

Last week, a phone call between Paetongtarn and Hun Sen made many people angry. Hun Sen was the leader of Cambodia for more than 40 years. Because of this call, people want Paetongtarn to leave her job.

Some people did not like that she tried to please Hun Sen, who was her father's friend. They said she made Thailand seem weak because she called a Thai army leader "an opponent." Some groups will have a protest this week to ask Paetongtarn to leave her job.