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A woman accused of fatally stabbing another woman in San Francisco’s Potrero Hill neighborhood last week pleaded not guilty to a murder charge today, a spokesman for the district attorney’s office said.

Maria Burgos, 48, allegedly stabbed Ernestine Herron, 26, of San Francisco, at about 11:30 a.m. on March 28 outside a home in the 1000 block of Connecticut Street between 25th and Wisconsin streets, police said.

Burgos and Herron had been involved in some sort of altercation on the street when Burgos allegedly used a knife to stab her in the neck, according to police.

Burgos was arrested shortly afterward near where the attack happened, police said.

The motive for the killing and relationship between the two women remains under investigation, authorities said.

In an arraignment hearing in San Francisco Superior Court today, Burgos pleaded not guilty to a murder charge, district attorney’s spokesman Seth Steward said.

She is currently being held in county jail on $2 million bail, Steward said.

Burgos is expected to return to court on April 29, he said.

Dan McMenamin, Bay City News

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