After a month-long journey, Central American migrants and refugees fleeing violence and poverty in large groups are beginning to arrive at the southern border of the United States to seek asylum.

The US donated military jeeps to Guatemalan task forces to combat drug trafficking in border regions, but they have been used elsewhere and for other purposes, such as intimidating an anti-corruption commission, in violation of donation agreements with the US Department of Defense.

Some 5,000 Central Americans rested in a makeshift refugee camp in a Mexico City stadium this week to prepare for next leg of journey to the US border.

Edgar Rodolfo Xon Ajanel called his mother just before he was set to cross the border from Mexico into the United States more than 10 years ago. "He said he was minutes away from crossing," Sofia Sebastiana Xon, one of Edgar's younger sisters, told Al Jazeera. "That was his last call."

A survivor of the 2010 San Fernando massacre of 72 migrants in Mexico, Billy Noe Martinez is making the trek again, hoping to find safety in numbers.

Parents travelling in a US-bound caravan of thousands of Central American migrants and refugees are taking legal action on behalf of their children against US President Donald Trump's border detention plans.

Orvelina Melendez witnessed her husband's murder. Now travelling with thousands of migrants and refugees in a US-bound caravan, she hopes to provide for her family, including her 6-year-old son with a chronic illness.

A Honduran man was killed late on Sunday as the crackdown on migrants and refugees walking from Central America to the United States intensified.

Group departs from El Salvador as others across Central America and Mexico join thousands on US-bound caravan.

Thousands of Honduran migrants and refugees in southern Mexico are continuing their journey north after a two-hour standoff with police.

"We left fleeing through our own lands, arriving through blind spots," says Oscar Omar Nuñez, a street vendor who fled violence and poverty in Honduras with his wife and their children. They are now with thousands making their way up through southern Mexico.

Thousands of migrants and refugees headed to the US find temporary shelter and help as they pass through Guatemala.

Human rights groups warn that government responses to Central American migrants and refugees fleeing to the US may violate international law.

Women and girls make up nearly half of the initial exodus from Honduras. Considering the risk of violence and sexual assault along the northbound route, many women say they find safety in numbers.

Facing tightened security, waves of Hondurans continue to try to make it to the US, saying they have no other choice.

As Trump ramps up threats, a group of migrants crossed into Mexico with thousands more heading towards border behind them as governments fortify borders and arrest caravan support activists.

US President Donald Trump's threats against a caravan of thousands of Honduran migrants headed to the United States will not deter people from fleeing the Central American country, activists say, adding they would welcome a cut in US military and security aid to Honduran security forces.

Families fleeing poverty and violence say facing Trump's immigration crackdown far outweighs risks of staying in Honduras.

Honduran activists blamed Donald Trump and the United States for the situation forcing thousands to flee the Honduras after the US president warned he may cut aid to the country if a migrant caravan isn't stopped.

A caravan of Central American immigrants traveling northbound in buses and on foot on Tuesday provoked the ire of President Trump, who threatened to cut off U.S. aid to Honduras if the group was not stopped.