New Delhi: At least 18 people were killed and three others injured in a shooting incident in southwest Mexico in an incident that appears to be linked to organised crime, news agency ANI reported citing local media.


The gunmen opened fire at city hall in the state of Guerrero on Wednesday afternoon, killing more than a dozen people including the city mayor, BNO News reported citing local officials.


This shooting incident took place in San Miguel Totolapan city.


ALSO READ | Kidnapped Indian-Origin Family Found Dead In Orchard In California: Officials


"Among the more than 20 dead, they confirm a minor under 12 years of age in San Miguel Totolapan. Guerrero Mexico Violencia In the centre of the city, in front of the Town Hall, rides were being set up for the fair," a Mexican journalist Jacob Morales A said in a tweet, as quoted by ANI.


Guerrero State Governor Evelyn Salgado Pineda expressed deep regret over the death of the San Miguel Totolapan mayor Conrado Mendoza Almeda. 


"I condemn the facts and reiterate that in the @Gob_Guerrero there will be no impunity in the face of the cunning aggression against the municipal president and officials of the City Council," Pineda tweeted in Spanish.


"Our commitment is firm, we will not take a step back to provide security to the population of San Miguel Totolapan and to our entire region of Tierra Caliente," she added.


Mayor Conrado Mendoza Almeda's party confirmed the city mayor's death and, it condemned the attack and called for justice. "The National Executive Directorate of #PRD condemns the cowardly murder of our colleague Conrado Mendoza Almeda, Mayor of San Miguel Totolapan, #Guerrero. We demand justice @FGEGuerrero, enough of violence and impunity," the party tweeted.


The shooting incident is the latest in the series of attacks that has rattled Mexico in recent weeks.