Istanbul, Turkey (CNN) -- At least 22 people were wounded when a bomb exploded in the center of Istanbul on Sunday, police said.
Ten police officers and 12 civilians were wounded in the attack in Taksim Square, police said.
Two of the wounded police officers are in critical condition, Istanbul Police Chief Huseyin Capkin said.
Capkin said it appeared that a male suicide bomber caused the explosion. A second unexploded bomb was found near the body of the suspected suicide bomber.
The suspected bomber tried to board a police bus parked in the square, but the explosion happened before he could enter, Capkin said.
Analysts familiar with the Kurdistan Workers' Party, known as the PKK, told CNN Turk that it is likely PKK was behind the attack.
But a party spokesman told CNN that he did not know anything about the explosion.
CNN
