Prompted by deadly shootings in Dayton, Ohio, and El Paso, Texas, that left 29 people dead over a 13-hour period from Friday, the Foreign Ministry warned Japanese citizens in the United States to stay vigilant against such dangers.

“Heeding to the possibility that shooting incidents could happen anywhere in the U.S., which is a gun society, please continue to stay alert as a precautionary measure,” the Consulate General of Japan in Detroit said in a statement on Sunday.

Two more shooting victims in El Paso later died of their injuries, raising the death toll in the two rampages to 31.

Uruguay, Venezuela and human rights group Amnesty International issued similar warnings.

The Uruguay Ministry of Foreign Relations advised their citizens living in or traveling to the U.S. to exercise caution against “growing indiscriminate violence, for the most part hate crimes” that “have cost more than 250 lives in the first seven months of this year.” It also warned its citizens to “avoid areas with large concentrations of people like theme parks, shopping centers, art festivals, religious events, food festivals and any kind of cultural or sporting gathering.”

Venezuelan President Nicolas Maduro issued a tweet on Monday urging his country’s citizens to stay alert or consider postponing travel to the U.S.

Amnesty International issued a travel warning and issued a statement Wednesday, urging tourists to “exercise extreme caution when traveling throughout the country due to rampant gun violence,” adding that the issue has become “so prevalent in the United States that it amounts to a human rights crisis.”

“Travelers to the United States should remain cautious that the country does not adequately protect people’s right to be safe, regardless of who they might be. People in the United States cannot reasonably expect to be free from harm — a guarantee of not being shot is impossible,” said Ernest Coverson, campaign manager for the End Gun Violence Campaign at Amnesty International USA.

“Once again, it is chillingly clear that the U.S. government is unwilling to ensure protection against gun violence,” Coverson added.