TORONTO -- A second man faces charges in last month's mass shooting during a barbecue at a housing complex in the city's east end.

But neither of the two men in custody are accused of firing the bullets that killed two young people and wounded 23 others on July 16 at the outdoor party on Danzig Street.

Shaquan Mesquito, the latest to be arrested in the worst public shooting Toronto has ever seen, was allegedly armed with a loaded .22-calibre revolver when he was yanked off a TTC bus and arrested July 27.

Toronto Police say the 18-year-old was charged that day with several firearms-related offences.

But he is also accused of threatening to hurt people at the Danzig Street townhouse complex -- before the bullets started flying.

"The uttering threats charge stems from information that was learned through the Danzig Street shooting investigation," Const. Tony Vella said Wednesday.

However, he said, "investigators have interviewed witnesses and at this time there is no information to suggest the accused was at the Danzig Street shooting scene."

"There is also no information to suggest the firearm seized from the accused was used in the Danzig Street shooting," Vella said.

More than 100 people are believed to have attended the barbecue, which began that afternoon as a kids' party and became a bash for adults as night fell.

A gun battle erupted around 10:40 p.m., sending party-goers running for their lives.

Shyanne Charles, 14, and Joshua Yasay, 23, were killed and 23 others wounded, including a 22-month-old boy who suffered a head wound.

Nahom Tsegazab, who was among the injured, was charged with reckless discharge of a firearm two days after the shooting.

It's believed the 19-year-old was the intended target.