Yemeni troops may have killed dozens of civilians caught in the crossfire over the past two months as government forces battled al-Qaida linked militants in the country's restive south, a leading human rights group said Saturday.
Human Rights Watch cited accounts from several residents who fled the fighting in southern Abyan province, where Yemeni troops are fighting Islamic militants after losing control over the provincial capital, Zinjibar, and another town, Jaar.
In a separate statement, tribal leaders in an opposition stronghold northeast of the capital Sanaa said at least 20 people have been killed since April in government shelling on villages.
The New York-based Human Rights Watch said the militants in Abyan "may have unlawfully placed civilians at risk by deploying in densely populated areas and engaging in looting and other abuses."
There are concerns al-Qaida's branch in Yemen is exploiting the country's turmoil amid a monthslong popular uprising seeking the ouster of President Ali Abdullah Saleh. The president has been in Saudi Arabia since June 5, undergoing treatment for injuries sustained in an attack on his presidential compound, but massive daily street protests demanding he relinquish power have continued unabated.
The fighting in Abyan has displaced around 70,000 people who have taken shelter in schools and abandoned homes in the adjoining Aden province, HRW said.
"Civilians are paying the price," said Joe Stork, deputy Mideast director at HRW. "Both sides need to be doing much more to protect civilians from harm."
Stork also urged the government in Sanaa to investigate laws-of-war violations committed by Yemeni forces in Abyan and prosecute those found responsible for violations that amount to war crimes.
HRW said it could not visit Abyan because of the security situation but its statement followed interviews conducted in late June in the southern port city of Aden with witnesses from Abyan, including some who were wounded.
In one incident described by HRW, government forces in May retaliated after a militant attack by opening fire at a crowd in the central market in Zinjibar, killing six civilians and wounding 35 others.
HRW cited an unnamed witness as saying the troops shot at people "right in front of them as if they were chickens," then chased after fleeing residents, "continuing to shoot them as they tried to escape."
The group also highlighted another incident, when Yemeni warplanes in late June fired at least two missiles at a passenger bus on a highway near Zinjibar, killing six and wounding 12 people.
The government later said the incident was an accident.
HRW also urged armed militant groups in Abyan to respect basic human rights, "minimize civilian casualties" and refrain from taking to densely populated areas.
According to a statement on Friday by Yemen's embassy in the United Sates, at least 70 soldiers and 50 militants have been killed in the fighting in Abyan. More than 300 soldiers and dozens of militants have been wounded, the statement said.
Meanwhile, tribal leaders of the mountainous region of Arhab northeast of Sanaa said that Republican Guard troops have shelled villages since April, killing at least 20 people and injuring 64.
The tribal officials said in a statement that the attacks have forced residents to flee their homes. Since the anti-Saleh uprising, the Arhab tribe has announced an alliance with the protesters and are trying to prevent deployment of pro-Saleh forces to the capital, prompting clashes between tribesmen and government forces.
In Taiz, the second-largest city in Yemen, 10 people were injured, including a 4-year-old girl, after government forces shelled a residential district early Saturday, according to witnesses. Taiz is a hotbed of opposition protests.