According to Czech news agency CTK, the Czech Health Ministry has restricted Czechs from traveling to Russia and Tunisia due to the proliferation of COVID-19 mutations in those countries.

The Czech Republic reported 157 new cases on Monday, up from 118 the week before, indicating a possible reversal in the downward trend that has been in place since the previous wave of infections peaked in March.

The travel ban will take effect for Russia on Thursday and Tunisia next week, according to CTK. In recent days, both countries have seen an increase in news cases.

The government has called a special session for Thursday to discuss a response to the spread of the Delta variant, first identified in India.

The country has so far identified 120 cases of the Delta variant, believed to be more transmissible than previous variants, the country’s National Institute of Public Health said.

The country of 10.7 million was one of the worst hit in Europe, suffering four waves of infections and 30,298 deaths.

It has fully vaccinated over 3.1 million people and had used just over eight million vaccine doses as of Monday.