New Delhi, Rajab 16, 1434, May 26, 2013, SPA - Officials reacted with outrage Sunday to an audacious attack by about 200 suspected Maoist rebels who set off a roadside bomb and opened fire on a convoy carrying Indian ruling Congress party leaders and members in an eastern state, killing 28 people and wounding 24 others. Prime Minister Manmohan Singh, accompanied by party President Sonia Gandhi, visited the injured in a hospital in the capital of Chhattisgarh state and said the government would take firm action against the perpetrators. "We are devastated," said Gandhi, who denounced what she called a "dastardly attack" on the country's democratic values. Rajnath Singh, president of opposition Bharatiya Janata Party, said the country should unite in its fight against the Maoist insurgency. The convoy was attacked Saturday in a densely forested area about 215 miles (345 kilometers) south of Raipur, Chhattisgarh's capital, as the Congress members were returning from a party rally. Four state party leaders and five police officers were among those killed. Other victims were party supporters, according to a report of the Associated Press. --SPA 12:08 LOCAL TIME 09:08 GMT www.spa.gov.sa/1114075