DAEJEON, South Korea (AP) -- South Korea laid to rest 46 sailors killed in the sinking of a navy warship during an emotional and solemn burial Thursday, as officials vowed retaliation against those responsible for what many believe was a North Korean attack.
Wailing families placed white chrysanthemums, burned incense and bowed in front of the framed photos of the men before their cremated ashes were buried at the country's national cemetery in the central city of Daejeon. Buddhist and Christian clergy offered prayers, a navy band played a dirge and troops fired a rifle salute.
Some mothers clad in black Korean traditional mourning dress wailed uncontrollably, touching photos of their sons and their urns wrapped in white cloth.
"It's your mother! Please answer me! Please answer me!" one mother shouted.
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The sailors went down with the 1,200-ton Cheonan near the tense western sea border with North Korea on March 26 shortly after it was split in two by what investigators believe was an underwater blast from outside the ship.
Fifty-eight people survived the disaster, and the bodies of 40 of the sailors were recovered, while six others remain unaccounted for and are presumed dead. Hair and nails from the missing were burned and those ashes were among those buried Thursday. Seamen and air force pilots in South Korea are required to submit bits of hair and nail in case they die in action and their remains cannot be recovered to ensure there is something to be buried in line with Confucian tradition.
South Korea has not directly blamed its Cold War-era rival North Korea, but suspicion has focused on Pyongyang given its history of provocations and attacks on the South. South Korea's defense minister said this week the blast was most likely caused by a torpedo attack. North Korea has denied any role in what was one of the South's worst naval disasters.
The ship's two main pieces have been hoisted, with investigators examining them to find any clues to the cause of the blast. But analysts, such as Paik Hak-soon at the private Sejong Institute, said the exact reason may never be known.
Earlier Thursday, sirens blared across South Korea when the funeral started at the 2nd Fleet headquarters in Pyeongtaek, south of Seoul, the ship's home base. Warships anchored there sounded whistles, and seamen aboard saluted when the vehicles carrying the ashes left for the cemetery. About 3,000 white and black balloons were released into the air.
A somber President Lee Myung-bak -- who joined 2,800 mourners at the ceremony -- placed military decorations on a giant altar below photos of each sailor. They were all posthumously promoted by one rank earlier this week.
"We cannot forgive this and must not forgive it and must not forget it," Navy Chief of Staff Kim Sung-chan said in a speech at the funeral. "We will never sit idly by in the face of whoever inflicted huge pain to our people."
Military retaliation against Pyongyang, however, is considered unlikely as it could lead to major conflict and frighten away investors at a time when South Korea is recovering fast from the global financial meltdown.
"A military response is both unrealistic and impossible," said Kim Yong-hyun, a North Korea expert at Seoul's Dongguk University. "That would further deepen military tension on the Korean peninsula."
The Cheonan was on a routine patrol before it sank near the disputed western sea border, a scene of three bloody sea battles between the rival Koreas that remain locked in a state of war since their 1950-53 conflict ended in a truce instead of a peace treaty.
North Korea has waged a slew of attacks against South Korea, including a 1987 downing of a South Korean passenger plane that killed all 115 people on board, one of the reasons the country is suspected of involvement. South Korea plotted military retaliations in some cases but the plans were never carried out.
In central Seoul people gathered Thursday at a plaza to remember the Cheonan sailors, placing chrysanthemums on an altar where photos of the dead were placed.
"I feel empty," said mourner Lee Yoon-suk, tears rolling down her cheeks "I truly hope they rest in peace in heaven."
Hyung-jin Kim reported from Seoul, South Korea. Associated Press writers Sangwon Yoon, Nate Kim and Kelly Olsen in Seoul and AP Television News cameraman Yong-ho Kim in Pyeongtaek, South Korea also contributed to this report.