A 39-year-old Ghanaian migrant has died while being detained at São Paulo's Guarulhos International Airport, sparking concerns over potential human rights abuses in the treatment of migrants there.The man, who passed away on August 13 after receiving medical care at the airport, was among a group of "inadmissible travelers" held due to insufficient documentation or visas.The death has drawn attention to the dire conditions faced by hundreds of migrants from countries such as India, Nepal, and Vietnam, who have been stranded at the airport for weeks.Confined to a restricted area with limited access to basic necessities like food, water, and showers, their deteriorating health raised alarms.The Public Defender's Office condemned these conditions as severe human rights violations.The situation coincides with Brazil's impending stricter entry regulations aimed at preventing the country from being used as a transit point by migrants heading to the United States and Canada.Meanwhile, the Brazil government plans to tighten entry rules on August 25 2024, aiming to curb the influx of foreigners using Brazil as a transit point to reach the United States and Canada further complicating the situation.BackgroundForeign travelersWithout a Brazilian visa who are transiting through the country to another destination will be required to proceed directly to their final destination or return to their country of origin starting Monday, according to a statement by Brazil's public security ministry on Wednesday.The ministry reported that Brazil has witnessed a significant increase in foreign travelers, especially from Asia, who land in the country claiming to be on a layover en route to North America.These passengers request refugee status upon arrival, citing persecution and threats in their home countries.Under the new regulations, passengers arriving in Sao Paulo without a visa will no longer be permitted to remain in Brazil, as stated by the ministry.It remains unclear whether these rules will be applicable to migrants currently at the Sao Paulo airport or only to those arriving after the implementation of the new policy.Immigration experts have raised concerns that the proposed rules may be in conflict with the 1951 U.N. Refugee Convention, which Brazil has signed.The convention requires countries to accept individuals at risk in their home country, even if they lack proper documentation.