Nathaniel D. Robinson, 19, of 24 Lyon St., Apt. 3, was booked last night at the Worcester Police Department on charges of murder and carrying a firearm without a license.

Another man allegedly involved in the killing of Javier A. Santiago outside City Hall on Nov. 30 has been arrested on a murder charge after he was picked up in the Bronx, N.Y., on a murder warrant.

Nathaniel D. Robinson, 19, of 24 Lyon St., Apt. 3, was booked last night at the Worcester Police Department on charges of murder and carrying a firearm without a license. The police log indicates the incident occurred at 455 Main St. — the same address listed for where Mr. Santiago was gunned down and the same one used when Patrick Pierre Jr., the co-defendant in this case, was arrested.

An arrest warrant on the murder charge for Mr. Robinson was issued Dec. 6 in Central District Court, according to court records and the police log.

Mr. Robinson was picked up sometime on Dec. 9 in the Bronx and brought to a courthouse there, according to court records in New York. He was scheduled to appear in court again there yesterday. Worcester detectives apparently later delivered him here on the murder charge.

Mr. Robinson is expected to appear today in Central District Court to face the murder charge.

Mr. Pierre, 21, was arraigned Dec. 7 in Central District Court on murder and firearms charges stemming from the shooting death of Mr. Santiago, a 20-year-old city resident.

Prosecutors said the midday shooting next to City Hall involved opposing gang members. Sometime before the shooting, the combatants were in an altercation in an alley that runs from Franklin to Federal street, adjacent to the Telegram & Gazette building.

Authorities have not said whether Mr. Robinson was the man who fatally shot Mr. Santiago, but Assistant District Attorney Joseph A. Quinlan said in court that Mr. Pierre handed a firearm to another man before the shooting.

Authorities reviewed a surveillance camera videotape of the altercation in Allen Court, which occurred 40 minutes before the fatal shooting. The tape led to the arrest of 17-year-old Javon Rodriguez on charges of assault with a dangerous weapon and misleading investigators.

Mr. Quinlan said at Mr. Rodriguez’s arraignment that the video showed Mr. Rodriguez running down the alley, followed by a group that included Mr. Santiago, then turning and waving a knife.

Mr. Rodriguez is accused of lying to police when questioned after the shooting. He allegedly sought help after the initial altercation, and Mr. Pierre and the alleged gunman, not identified by name during court proceeding, responded.

Authorities initially thought Mr. Santiago died from complications involving an asthma attack.

It was later discovered at an autopsy that he had been shot once in the upper torso and died from the gunshot wound.

Court records identified Mr. Santiago as a member of the Providence Street Posse gang. Authorities have said the shooting of Mr. Santiago involved members of the Kilby Street gang.

Mr. Pierre was identified as a member of the Kilby Street gang in court records associated with stabbings at a movie theater at The Shoppes at Blackstone Valley in Millbury. The attack on two men was on May 8, 2010, and involved many members of the Kilby Street gang.

Records show the victims in the case were from Plumley Village. Court records indicate Kilby members feud with members of Plumley Village East, which is aligned with the Providence Street Posse.

Mr. Pierre had been sentenced to 5 years’ probation in October after being found guilty of multiple counts of aggravated assault and battery with a dangerous weapon and assault and battery stemming from the attacks at the theater.