Robert Bowers, suspected of killing 11 people in the Tree of Life synagogue in Pittsburgh, Pennsylvania, has pleaded not guilty.

The truck driver entered the plea during an appearance in federal court for charges that could result in the death penalty.

There are 44 charges against the avowed antisemitic ranging from murder to hate crimes and obstructing the practice of a religion.

Prosecutors have said they will be pursuing the death penalty against him in the incident that is the deadliest-ever attack against Jews in the US.

He appeared in court with a bandage on his left arm, the result of a shootout with police at the synagogue on the morning of 28 October.

Mr Bowers is accused of interrupting a bris at the synagogue, located in the Squirrel Hill neighbourhood of Pittsburgh, and gunning down victims using a semiautomatic rifle and handguns after shouting "All Jews must die."

Synagogue Shooting Suspect was treated at hospital by Jewish doctor and Jewish nurse

Donning a red prison-issued jumpsuit, he did not speak much in court except to say he understood the charges against him could result in being put on death row and to enter his plea.

During his previous court appearance earlier in the week, Mr Bowers had been shackled to a wheelchair since he was still being treated for his gunshot wound.

The 11 victims were regulars at the Tree of Life, there to attend Saturday services when the massacre occurred.

Rose Mallinger was the oldest among them at 97 and "was considered a pillar of the Jewish community" according to a statement from her family, Jerri Rabinowitz was a doctor who was killed as he ran towards the gunfire to help the wounded, Cecil and David Rosenthal were brothers and both developmentally disabled. One congregant Katy Levin told ABC News the pair were always seen together and she took comfort they were next to each other in their last moments.

Mass shootings in America Show all 8 1 /8 Mass shootings in America Mass shootings in America Camden shootings – 1949 Howard Unruh killed 13 people, including three children, during a 12-minute walk through his neighborhood on September 6, 1949, in Camden, New Jersey, when he was 28 years old. The incident became known as the "Walk of Death". Unruh was found to be criminally insane and died in 2009 after a lengthy illness at the age of 88, following 60 years of confinement. Alamy Mass shootings in America University of Texas tower shooting – 1966 Charles Whitman killed 17 people and injured 31 others in Austin, Texas. After stabbing his mother and wife the night before, he headed to the University of Texas, where he opened fire on people in the campus and streets from the observation desk. He was shot dead after a policeman and civilian reached the scene. Austin History Center, Austin Public Library Mass shootings in America Easter Sunday Massacre – 1975 James Ruppert killd 11 family members in his mother's house, which included his mother, brother and his wife, as well as their eight children. He used a magnum, two handguns and a rifle. Mass shootings in America Wilkes-Barre shootings – 1982 Former prison guard, George Banks, shot dead 13 people in Pennsylvania, including five of his own children. AP Photo/Times Leader Mass shootings in America Wah Mee massacre – 1983 Three men, Kwan Fai Mak, Wai-Chiu Ng, and Benjamin Ng, killed 13 people who were in Seattle's Wah Mee gambling club. YouTube/KIRO 7 News Mass shootings in America San Ysidro McDonald's massacre – 1984 James Huberty killed 21 people and injured 19 others after he walked in a McDonald's in San Diego. He was shot dead by a sniper after 78 minutes of him entering the restaurant. Alamy Mass shootings in America Palm Sunday massacre – 1984 Ten people were shot dead from handguns at close range in a New York home. A baby girl was the only survivor after convicted dealer, Christopher Thomas, shot three women, one teenage girl and six children in their Brooklyn home. Thomas was convicted of manslaughter and cleared of murder. He was released from prison after 32 years. Mass shootings in America Edmond post office shooting – 1986 Patrick Sherrill, a postal worker at the Edmond post office in Oklahoma, killed 14 co-workers and injured 6 others, before he shot himself. Oklahoma Highway Patrol Collection

Daniel Stein was a new grandfather, Richard Gottfried was a dentist and once-president at the Tree of Life, Joyce Fienberg was a grandmother of six who had mastered social media in order to stay in touch with them, 88-year-old Melvin Wax would lead services for the congregation when they needed it.

Bernice and Sylvan Simon, both in their late 80s, were killed in the same synagogue in which they were married and Irving Younger was another grandfather and volunteer who greeted his congregation at services.

Support free-thinking journalism and attend Independent events

Judah Samet, 80, was not among the victims having arrived at the synagogue just four minutes late. As a child, Mr Samet had escaped the Bergen-Belsen concentration camp in Germany during the Second World War.

“I survived the second time," he told the Washington Post about how he was in the parking lot just as the shooting was taking place.

Four police officers were also wounded in the shooting.