Adriano added the fifth goal as the world champions stayed top of the 10-nation South American qualifying group at the halfway mark of the competition, with 19 points from nine games.

Venezuela, who grabbed two late consolation strikes through forward Ruberth Moran, have 10 points.

The first supporter came on to the pitch after Ronaldo had scored Brazil's fourth goal in the 51st minute and hugged fullback Roberto Carlos before being pulled away by security men.

Shortly after, another fan, wearing a Brazil shirt, went on the field and did the same to Ronaldo.

Although Roberto Carlos laughed off the incident, the Venezuelans could find themselves in serious trouble for the double security lapse.

The first half was even in terms of possession but Kaka's two goals made the difference. Ronaldo then scored twice in three minutes after the break to kill off the home team.

"Venezuela don't have the decisiveness we have in attack and that is the difference, that's why we deserve to win," Brazil coach Carlos Alberto Parreira told reporters.

Venezuela, who have lost all 16 meetings with Brazil, had hoped to end their wretched run after enjoying a huge improvement in the last three years under coach Richard Paez.

Paez said he was pleased with his team's performance even though they lost.

"Brazil were undoubtedly the better team but I liked Venezuela's attitude and I believe we learned a lot," he said.

"For the first time, we saw a Venezuela team that wasn't afraid of Brazil. We didn't defend, we always went for goal which is our philosophy.

Brazil almost went ahead inside a minute when Ze Roberto's shot was cleared off the line by Luis Vera.

Kaka, who was left out of last month's match against Bolivia after he failed to take part in an August friendly in Haiti, played a one-two with Ronaldinho on six minutes, slipped through several defenders and placed his shot in the right corner of the net.

Venezuela then twice tested Dida with long-range shots. The AC Milan goalkeeper parried one dipping effort from Juan Arango before tipping Jose Manuel Rey's swerving free kick over the crossbar.

The world champions always looked dangerous on the break and went further ahead in the 35th minute when Ronaldo broke clear, rounded goalkeeper Gilberto Angelucci and slipped the ball to Kaka, whose shot was deflected in by Rey.

Ronaldo turned in Ze Roberto's 49th-minute cross to grab his eighth goal of the qualifiers.

Two minutes later, Ronaldo struck again with the help of an Angelucci blunder. The Real Madrid player burst through the defence and, although his shot was weak, it slid through the goalkeeper's legs.

Ronaldo said he wanted to keep Brazil apart from his club Real Madrid, where he has hit a bad run of form.

"It's good to separate things," said Ronaldo, who is the leading scorer in the South American World Cup qualifying competition with nine goals.

"In the national team, I'm doing well and scoring goals. At Real Madrid, I'm going through a bad patch."

Adriano came off the bench in the 68th minute to replace Ronaldo and netted the fifth with 15 minutes left.

Venezuela, who had only scored twice in their previous 15 matches against Brazil, doubled their tally when Moran scored from close range in the 80th minute before calmly converting a chance set up by another Arango run in injury time.

In between, Adriano missed a chance for the sixth when he miscued a tap-in on the goalline.