Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: MEXICO CITY (AP) — A group of 29 inmates have tunneled their way out of a prison in the northern Mexico border state of Tamaulipas, authorities said Thursday. 
  
 One of the inmates shot to death a passing motorist in an apparent carjacking as part of the mass escape in the state capital, Ciudad Victoria. 
  
 The Tamaulipas state security spokesman Luis Alberto Rodriguez said 12 of the 29 have been recaptured. 
  
 Rodriguez said the inmates had dug a tunnel about 5 yards (meters) deep and 40 yards (meters) long to flee. 
  
 Rodriguez said the tunnel was hidden in a hut that inmates had illegally constructed in a part of the prison they essentially controlled. 
  
 Overcrowding, corruption and inmate control of prison areas have been persistent problems in Mexican prisons. 
  
 Rodriguez said about 30 guards at the facility had been placed under investigation, and appealed for help from neighboring states in re-apprehending the escaped inmates. 
  
 He said the prison dates to the 1940s and was outmoded. State authorities have been looking into moving the prison to other facilities, outside the city. 
  
 Ciudad Victoria has been dominated for years by the fragmented Zetas cartel. ||||| Story highlights 29 inmates escape via a tunnel 
  
 The tunnel was sealed with concrete Saturday 
  
 (CNN) Fourteen of 29 inmates are still on the run after they escaped by tunneling underneath a Mexican prison wall, authorities said Sunday. 
  
 The inmates escaped Wednesday from a prison in Ciudad Victoria, Tamaulipas state secretariat of security said Saturday 
  
 According to Mexican authorities, the inmates used a tunnel that was 5 meters (16.4 feet) deep and 40 meters (131 feet) long. 
  
 During the escape, one of the inmates shot a man during a carjacking. 
  
 The Tamaulipas' state secretariat of security said 20 of the prisoners were incarcerated for "common" crimes such as robbery, assault, homicide and kidnapping. Nine were incarcerated for federal crimes such as drug trafficking and carrying weapons. Of those nine, four were members of organized crime organizations. 
  
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A:
Sixteen inmates are still at large after breaking out of a prison in the Mexican border state of Tamaulipas, CNN reports. The inmates dug a 5-yard-deep, 40-yard-long tunnel to escape from the Ciudad Victoria prison, the AP reports; 29 inmates in total escaped Thursday, but 13 have since been recaptured. The tunnel was hidden in an illegal hut in an area of the prison essentially controlled by inmates; following the escape, security officials destroyed other such illegal shelters at the prison, leading to riots in which three inmates were stabbed to death Friday night.