Quebec Premier Jean Charest says he's weighing all the options on whether to hold a public inquiry into construction corruption.

A report in La Presse today says the Charest government will announce plans in two weeks for an inquiry that would be held mainly behind closed doors.

Asked about the report by journalists covering his trip to Paris, the premier replied Thursday that his government is still studying each option.

Charest has for two years steadfastly resisted calls for an inquiry, saying the problem is best dealt with through criminal investigations and changes to rules for public-works contracting and political fundraising.

But since the recent release of an incendiary report by the province's anti-collusion watchdog, which describes the need for an inquiry as urgent, the premier has said he'll consider it.

"The government will take the time to weigh each option,'' Charest said Thursday.

"But the simple fact is that in these last few days everyone has had a better idea of the consequences that an inquiry _ public or private _ would have on police investigations.''

The anti-collusion watchdog, Jacques Duchesneau, is proposing a two-phase inquiry: the first part would be held behind closed doors, where witnesses would testify about cases of corruption. The second part, to be held in public, would examine policy changes that might avert future corruption.

Meanwhile, a report by Radio-Canada today says Duchesneau has asked for _ and been granted _ an extended vacation. But his employer issued a statement later Thursday saying the departure in question was simply two weeks' holiday.

The ex-Montreal police chief had been at odds with the boss of the anti-corruption squad that oversees his own unit.

Duchesneau favours an inquiry and suggests the provincial anti-corruption unit should not be run by a police officer. His boss, a longtime police officer, opposes an inquiry.