Pedro Aguayo Ramirez, known as Hijo del Perro Aguayo

In this May 27, 2010 photo, Mexican wrestler Pedro Aguayo Ramirez, known as Hijo del Perro Aguayo, poses for photographers at the start of a news conference in Mexico City. Ramirez, the son of a wrestling legend in the country, died early Saturday March 21, 2015, from a hit suffered in the ring in Tijuana, the Baja California state prosecutor's office said.

(AP Photo/Enrique Ordonez)

MEXICO CITY -- Professional wrestler Rey Mysterio Jr. expressed stunned sympathy Saturday after authorities said his blow during a wrestling match the night before killed the son of a Mexican wrestling legend.

Pedro Aguayo Ramirez, known as Hijo del Perro Aguayo, fell unconscious on the ropes Friday after receiving a flying kick from Mysterio, according to video of the match in a municipal auditorium in Tijuana, Mexico.

The Baja California state prosecutor's office said Ramirez died from the blow in the ring. TMZ reported that cause of death appeared to be a snapped vertebrae when Ramirez's head hit the ropes.

The state prosecutor's office said it is investigating whether to file a manslaughter charge, The Associated Press said.

In several tweets posted in Spanish, Mysterio, whose real name is Oscar Gutierrez, said he was left wondering how God allowed such a tragic accident to occur.

Pero en esta ocacion me pregunto porque y no lo entiendo, te extrañare y te llevare conmigo el resto de mi vida,descansa en Paz HijoDelPerro — ♛Rey Mysterio❔ (@reymysterio) March 21, 2015

According to wrestlezone.com, two of the tweets translate as: "Just formed a friendship between brothers who opened years ago and we should not question the designs of God. But in this occasion I wonder why and I do not understand it...I take you with me for the rest of my life, rest in peace HijoDelPerro."

In this April 13, 2007 photo, Mexican wrestler Pedro Aguayo Ramirez, known as Hijo del Perro Aguayo, top, tries to remove the mask of Mistico during a wrestling match in Mexico City.

The match continued for about two minutes until other participants and the referee realized Aguayo was seriously injured and began to tend to him, AP said.

He died at the hospital at about 1:30 a.m. Saturday, prosecutor's spokesman Raul Gutierrez said.



The Crash, the company that reportedly organized the event, couldn't be reached for comment.



"I have no words for this terrible news," Joaquin Roldan, director of the AAA wrestling federation, said on Twitter. "My sincerest condolences for the Aguayo Ramirez family."



Mexico is famous for its colorful characters and costumes in professional wrestling, popularly known as lucha libre. The fighters perform daring aerial maneuvers inside and outside the ring.



Aguayo, 35, had wrestled for 20 years and was the son of the legendary Pedro "Perro" Aguayo, now retired and a member of the Aztec lucha hall of fame.



The younger Aguayo was also popular and led a group called "Los Perros de Mal," or the bad dogs. He won numerous titles, including national pairs with his father, a national heavyweight championship and the Consejo Mundial Lucha Libre world trios championship.



"It makes me very sad because he was a professional colleague and I have great affection for his father," the wrestler Hijo del Santo said in a telephone interview. "I think the fans in Japan, the U.S. and Mexico, of course, where he was very popular, must be in mourning, especially because of his youth. He had much ahead of him."

The Associated Press contributed to this report.