Authorities announced the arrest of a cartel assassin and uncovered at least four bodies as well as a large arsenal of high-powered rifles and ammo hidden all over the land near his mansion in central Mexico on Tuesday.

Law enforcement agents in the state of Guanajuato did not encounter any resistance when they arrested a man who was identified as Nelson, 'El Titi', 23, the presumed hit squad leader of the Santa Rosa de Lima Cartel.

He was arrested wearing a $12 black t-shirt emblazoned with the abbreviation N.W.A (Narcos with Attitude) and the head shots of Mexico's most notorious drug lords, named as Caro, El M-Z, El Chapo, El Senor de los Cielos and Mochomo.

The joint operation between state and municipality police in the town of Santa Rosa de Lima, also produced the arrest of a 23-year-old woman identified as Paola, and a 42-year-old male, Alfonso, who is also known as 'El Indio'.

Nelson (pictured), who is also known as 'El Titi', was arrested during an operation in the central Mexican state of Guanajuato. El Titi is accused of leading the Santa Rosa de Lima Cartel's assassin squad

State and municipal police officers in Guanajuato, Mexico, were met without force when they raided a mansion Tuesday and arrested three people and also found four dead human bodies

El Titi allegedly had secret underground stash areas where drugs, weapons and ammunitions were hidden

The raid took place less than a week after the cartel's armed convoy attacked a police station in the municipality of Celaya and freed Armando 'El Triste' Soto González, an alleged rival gang member of the La Familia Michoacana.

The hit squad, dressed in stolen police uniforms, tossed El Triste into a vehicle's trunk during last Thursday afternoon's brazen ambush attack.

However, he was declared dead following a gun battle between the cops and several members of the Santa Rosa de Lima Cartel.

Tuesday's investigation also led police agents to at least four lifeless bodies which were found at the compound that served as El Titi's hideout spot.

The Guanajuato State Attorney General's Office is still investigating the motive behind their deaths. None of the victims were identified.

El Titi's mansion in Guanajuato, Mexico, was lightly furnished. Pictured is his home's kitchen area

El Titi's lavish hideout mansion in central Mexico includes an outdoor pool

Cops recovered 16 military asault rifles and 1,800 ammunition cartridges in Tuesday's raid

El Titi (middle) was accused by the prosecutor's office in the state of Guanajuato of being directly involved with the Santa Rosa de Lima Cartel's illegal oil-tapping theft in the cities of Villagrán, Celaya, Salvatierra and Comonfort

The prosecutor's office fingered El Titi for his involvement with the Santa Rosa de Lima Cartel's illegal oil-tapping theft in the cities of Villagrán, Celaya, Salvatierra and Comonfort.

Agents discovered an underground stash area where the suspect hid 16 military rifles, 1,800 ammunition cartridges, bulletproof vests and ski masks.

Law enforcement officials believe El Titi was directly involved in an assault at a police station in Guanajuato that led to the death of Armando 'El Triste' Soto González, an alleged gang member of the La Familia Michoacana. El Triste was removed from the police precinct and placed inside a vehicle's trunk but later died during a gun battle between cops and El Titi's men

Agents also apprehended a woman identified as Paola, and a male identified as Alfonso, nicknamed El Indio

Cops recovered 16 assault weapons from El Titi's mansion in Tuesday's raid, including two that were kept inside a bedroom

Officials also seized a kilo of marijuana and two sealed packages which appeared to be cocaine as well as three cars, a motorcycle and a jet ski.

The Santa Rosa de Lima Cartel, which is led by José Antonio 'El Marro' Yépez Ortiz, rose to prominence in 2017 and is known for being responsible for most of the oil theft in Guanajuato, which is home to the state-owned Pemex refinery.

The area has also witnessed an ongoing battle between El Marro's criminal organization and the Jalisco New Generation Cartel, considered to be the most powerful in Mexico.

In October 2017, El Marro called out the rival gang and threatened to wipe it out if it continued to steal from the oil ducts in Guanajuato.