Glorietta 2 explosion: was it caused by islamic extremist act or just a freak accident?

Today at aound 1:40 pm (+8:00 GMT) the business district of the Republic of the Philippines, Makati City, had experienced yet again another explosive blast on the same ground of the previous explosion - the Glorietta Mall, owned by the Ayala Corp. According to ABS-CBN news the explosion happened in the storage room of one of the restaurants the said mall caters. Up to today, authorities are not sure whether the cause of the explosion was made by a leak on the LPG (liquefied petroleum gas) or was made by an improvised explosive planted inside the mall.

"This was a bomb. But beyond that we can't say anything else yet because we are still investigating. What I can say is it was not LPG that caused this," Razon told reporters.

However, there is still no clear evidence to rule out what was first thought of about the explosion that it was caused by the leak on an LPG tank, until the authorities had finished their investigation on the said site.

Due to the said explosion, 8 were killed while more than 56 were injured having different degrees of flesh cuts and burns. Moreover, according to the news 2 individuals were still in a critical condition confined in Makati Medical Center. I just pray that God may spare them and let them live to testify to the public on how horrendous the situation they had been if it was caused by extremist bombing.

One thing is for sure about what had happened today, that people should be more vigilant on the places they are going to since no one have any idea on whether the same explosion in the Glorietta 2 mall will be repeated on another place or another mall.

Edit: Sen. Trillianes states on the news that it was the Arroyo government that should be blamed for the said explosion. Instead of blaming the government Mr. Trillianes, why not find the real culprit if the said explosion was caused by a bomb? Instead of blabbering about nonsensical things that are baseless more so factless why not work as a senator and use your connections to get to the bottom of this incident?

Related links:
ABS-CBN news
BBC News
Inquirer News