Tegucigalpa, Honduras ? Authorities on Saturday announced the arrest of two additional suspects in an attack on a bus that killed 28 passengers and wounded 14, while thousands of soldiers searched for more of the gunmen and families buried the victims.

Six children and 22 adults died Thursday when suspected gang members wielding assault rifles cornered a city bus in the San Pedro Sula suburb of Chamelecon, 125 miles north of the capital, Tegucigalpa, and sprayed it with gunfire.

The attack on a busload of commuters and Christmas shoppers stunned a country known for lawlessness and has made the government’s anti-crime campaign resemble an open war between street gangs and authorities.

Services for the victims took place under sunny skies on Christmas Day as about 2,000 soldiers combed the slums and outskirts of San Pedro Sula for those responsible.

Suspected gang member Alexis Ramirez, 23, was arrested in San Pedro shortly after the attack while driving a car containing two assault rifles, two pistols and ammunition, officials said.

Authorities said Saturday that two suspected gang members arrested in Cofradia, about 10 miles east of San Pedro, had been linked to the attack.

“We are not revealing more details for the moment to avoid interfering with the investigations,” said Honduran Security Minister Oscar Alvarez. “But we have concrete leads that soon with clear up the killings.”

Deputy Police Commissioner Wilmer Torres said Ramirez was a member of the Mara Salvatrucha, a ruthless youth gang known for committing shock killings, and that the car he drove resembled a car at the scene of the attack.

In a message left on the bus’ windshield Thursday, the gunmen said they were part of a revolutionary group opposed to the death penalty, one of the main campaign issues in next year’s presidential campaign.

Genoveva Rodriguez, center, cries during Saturday's funeral for her son in San Pedro Sula, north of Tegucigalpa, Honduras. Assailants opened fire on a public bus Thursday night, leaving 28 people dead and promises of more violence, marking an escalation in what increasingly looks like a war between authorities and Central America's criminal underworld.

The message also threatened congressional President Porfirio Lobo Sosa, a death penalty supporter and one of four contenders for the ruling National Party’s 2005 presidential nomination.

“I express to the families of the victims that Honduras cries for them,” President Ricardo Maduro said.

The government would donate wood caskets and $550 to the victims’ families, Maduro said and also announced assistance for children orphaned by the attack.

Maduro, whose son was kidnapped and killed in 1997, took office in 2001 promising to eliminate the country’s prolific gangs, many of which began on the street of Los Angeles in the 1980s and spread to El Salvador and Honduras after members were deported.