There are mounting security concerns in Haiti's earthquake-hit capital as distribution problems continue to hamper getting aid to survivors.
BBC News website readers have been describing how the earthquake has affected them.
Frederic Dupoux, photographer, Port-au-Prince
Survivors say not enough aid is reaching them. Photo: Frederic Dupoux
I was in the mountains, in a suburb of Port-au-Prince when the earthquake happened. Once I realised what the magnitude is, I went straight down to the city. The further I got, the worst things got. It was terrifying.
Right now everyone is waiting for help, looking for fuel, food and water. We did not expect such a tragedy, so nobody has got any supplies.
There are no shops open and people don't know what to do. The security situation is becoming a problem too. Streets can get very violent and you have to be careful.
I haven't witnessed any violence, but I have seen people looting houses and shops in their struggle to find food.
I would like to say to people around world: please bring help, bring hands, send food and water
Here's an example to illustrate the situation - my uncle has a water distribution business. Right now he is distributing the water for free, but he can't do that on his own, he has a military escort.
Everybody is looking for food and water. Aid is coming through, but you don't see it everywhere, it's not on a big scale. People are asking for help and they are wondering why so little has arrived.
Yesterday I witnessed something that shows how desperate people are. A rescue team asked a crowd of people to guide them towards places where people might be trapped. The crowd insisted that they are the ones who needed the help.
I spend my days out in the streets, taking photographs of the destruction and people's struggle to survive. Everybody is like me - out in the streets, not by choice, but because there's no place to go.
People are camping outside, setting up tents on every little green they can find.
I would like to say to people around world: please bring help, send food and water.
The whole city is destroyed and has to be rebuilt. Everything is broken. It's really difficult to describe. We need to know what to do after that and right now we don't even know what tomorrow will be like.
Dixie Bickell, director "God's Littlest Angels" orphanage, Haiti
Hospitals in Haiti are ill-equipped to deal with the injured
We look after 147 children, ranging from newborns to 12-year-olds.
We are running low on supplies: I have enough rice to feed the children for a week but we are low on water, sugar, basic foods, diesel and cooking fuel.
I know there will be many more children coming to the orphanage soon, so we need as many beds as we can get. My house is full at the moment but I would like to take on more orphans. Even though many have lost their parents, we are praying that their families will come forward for them.
The atmosphere here is still very tense. We had a large aftershock at 1100 which lasted five minutes and we have had several smaller ones since then. It's incredibly unnerving. Many of the children are outside, too scared to come in.
We have seen aid at the airport but it will take some time to get to us
We have seen some aid at the airport but I have not seen it being distributed to the people yet. In any case it will take some time to get to us. As we are 12 miles from the centre of Port-au-Prince I don't think we will get much help.
Today I have sent two children to their new families in Luxembourg and three children to families in the Netherlands. I'm also hoping we can evacuate more children on Tuesday but that is yet to be confirmed.
I really have to applaud the Dutch government for putting the needs of the children first and speeding up the adoption process. These children were going through the process before the earthquake happened and they have already been approved for adoption by the Haitian authorities.