Philadelphia Police said the suspect was taken into custody after he stabbed the doctor who was treating him at Pennsylvania Hospital.
Officers found the victims after responding to the stabbing at Oak Park Elementary School in Hatfield Township, Pennsylvania.
Police are investigating four stabbing incidents on New York City subways, including two people who were killed in the last 24 hours.
The girls—aged between 12 and 14—have been charged in connection with the teenage girl's death inside a Walmart store in Lake Charles, Louisiana.
The victim was discovered at a home in Jersey Pike, Chattanooga, with multiple stab wounds and was pronounced dead at the scene. The male suspect was also located on scene and was detained.
The man has not been identified and the girl, who was found with cuts on her hand, will remain anonymous because of her age.
Oliver Stephens, 13, was allegedly stabbed to death on Sunday.
The 22-year-old man was arrested after allegedly attacking his grandfather, a 49-year-old relative and his 4-year-old sister.
The 29-year-old is facing attempted murder and other charges after also assaulting a fire lieutenant trying to administer first aid.
Michael Robinson is being held on a charge of battery in the first degree after the stabbing in Fort Smith, Arkansas on Friday.
Russian Lilia Sudakova, 26, faces up to 15 years in prison after allegedly stabbing her husband to death with a kitchen knife.
Police launched a homicide investigation after the woman's body was discovered by someone walking along the Hosp Grove Trail East in Carlsbad, California.
The attack occurred at the Grace Baptist Church, near the San Jose State University campus, in San Jose, California.
One person was stabbed during a fight as counterprotesters clashed with supporters of the president after the pro-Trump "Million MAGA March" on Saturday.
The 13-year-old used a box cutter to attack his classmate during a sixth grade math class at Handley Middle School in Fort Worth.
The condition of two stabbing victims is unknown at the time. The stabbing happened around 3:30 p.m. in Point Pleasant Beach.
Burning attacks can leave victims with lifelong scarring, nerve damage and psychological trauma after a prolonged hospitalization.
All three officers are expected to survive their injuries.
Brandon Clark admitted to the murder of 17-year-old Utica teen Bianca Devins, but now wants to reverse his plea.
Judge Cheryl Albrecht sentenced Jeremy Christian, 38, to life in prison without the possibility of parole on Wednesday, more than three years after he stabbed three men, killing two and injuring another, who had attempted to intervene in his racist tirade against two Black teenagers.
Multiple people were stabbed Saturday at the site of a recurring Black Lives Matter demonstration in Reading, a large town in England.
According to Chinese state media, 37 students and two adults were injured in the Thursday-morning attack at the school in Cangwu County at 8.30am local time.
Khaled Ahmad reportedly approached officers in Dyker Heights, Brooklyn and told them: "I killed my father."
Mark Latunski, 50, is accused of killing 25-year-old hairstylist Kevin Bacon, who was found hanging by his ankles in Latunski's basement in Michigan in December.
Jared Noiman, 26, was charged with first-degree murder in the death of his father, Jay Noiman, in Boca Raton, Florida.
The man was shot by armed officers on a street in Streatham, in London, on Sunday afternoon, the Metropolitan Police said.
The injured crocodile was found with a steel arrow piercing its body and several stab wounds to its neck and throat in northern Queensland, Australia.
Mollie Fitzgerald, 38, who had a role in 2011's "Captain America: The First Avenger," has been charged with second-degree murder relating to the death of her mother Patricia.
"The rise in anti-Semitic violence in NYC is something that could have been stopped [if the city had] a Mayor who worked full time & paid attention to what was going on," Giuliani tweeted.
New York Governor Andrew Cuomo said he was "horrified" by the Monsey stabbings, calling the acts "despicable" and "cowardly."