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Severed heads found in street

two severed human heads were found by Mexico City police on a street near a major military base -- a grisly tactic of warring drug gangs that has long affected other parts of the country while largely sparing the capital.

Decapitations are frequently carried out by gangs in drug-violence-plagued cities such as the Pacific coast resort of Acapulco and in northern Mexico, often to intimidate or threaten rivals.

One of the heads found yesterday had been placed on a car bonnet, and the other was found on a nearby pavement across from the army's headquarters at Military Camp 1.

DJ is held on

murder charge

One of Jamaica's most popular DJs, dancehall star Vybz Kartel, has been charged with murder.

The rapper, whose real name is Adijah Palmer, has been accused of conspiring with others to kill a 27-year-old promoter who was slain on a street corner.

Known for sexually explicit and violent lyrics, Kartel (35) has previously been arrested on charges including assault and illegal gun possession. Those charges were later dropped.

Spock boldly bows out at 80

Leonard Nimoy has attended his final Star Trek convention.

The 80-year-old actor, best-known for playing Spock in the original TV series that began in September 1966, formed a Vulcan sign and urged fans in Chicago to "Live long and prosper".

Thanking fans for their support over the years, Nimoy said the convention celebrating the 45th anniversary of Star Trek would be his last.

Hunt for dawn

of the cosmos

A huge and powerful new telescope has begun probing the universe from a high-altitude plateau in northern Chile, and astronomers hope it will reveal the earliest dawn of the cosmos.

The Alma telescope uses radio technology to see wavelengths of light that are longer than what is visible to the human eye, and much colder than what shows up in infrared telescopes.

This allows astronomers to see some of the darkest and coldest regions of space.